Nurse!

Karol G took one of the hardest falls onstage we've seen in a while -- but she also bounced back just as quickly.

The singer was performing in Miami Friday, playing to a packed FTX Arena ... when, at one point, she slipped and fell down a flight of stairs on the stage.

Check out the video ... it's pretty brutal, as the fall was quite long -- and sent her whole body twirling all the way down. Eventually, she landed on all fours facing the ground ... almost in a fetal position.

One of her dancers raced down to attend to her, but before ya knew it ... she was back on her feet and carried on with the show. Unclear if she ended up finishing her entire set, because afterward she told a local outlet her nails were broken and her knee was busted.

Jon Gosselin was bitten by a spider, and it really messed him up.

Jon tells TMZ ... he doesn't know exactly where it happened, but his leg swelled up to twice its normal size. He says ... and the pain was "excruciating." He could barely walk and rushed himself to an Urgent Care, where he got an Rx for antibiotics and antibiotic cream.

Jon told The Sun he believes it was a brown, recluse spider. If he's right, these critters are super dangerous. People have lost limbs after being bitten. Some have even died.

Jon made it clear to The Sun, 2021 has sucked for him ... "My first thought was 'What now?' I have had a rough year, my breakup was hard, then I got COVID, which was bad. It was really weird because when I looked at my leg I realized it was twice the size and there's a red-looking blister with a large red circle around it."

Gosselin went on to say ... "It kind of looked like a cigarette burn, but really raised. The doc immediately knew the pain was from a brown recluse, which is a deadly spider. My entire leg had swollen up from the cellulitis."

He wasn't done ... "The doctor told me that I was lucky to come in because if you don't treat this you can lose limbs or die from a bacterial infection. I just wish I knew where the spider was so I can take my revenge."

Mark Cavendish -- one of the greatest road sprinters of all time -- says he's in pain after a violent spill during an event in Belgium ... leaving him with 2 broken ribs and a collapsed lung.

The crash happened at the Six Days of Ghent competition Sunday night ... when the 36-year-old -- alongside his teammate -- collided with cyclist Lasse Norman Hansen.

You can see in the footage, a biker ahead of Cavendish and Hansen lost control ... causing them to crash into each other at full speed and go spinning on the track floor.

Cavendish stood up after the crash but was taken to the Ghent University Hospital for observation --- his team, Deceuninck-Quick-Step, announced Monday he broke 2 ribs on his left side and a small pneumothorax.

"It is expected that Mark will be discharged either later today or tomorrow morning," Cavendish's team said, "and will then undergo a period of recuperation."

Cavendish -- in his hospital bed -- thanked all the fans for showing love via IG -- saying, "Just want to say how overwhelmed & thankful I am for all the support and well-wishes."

"In a bit of pain, but a couple of nights with the incredible staff here at Ghent University Hospital should sort me out."

Cavendish -- who won 34 Tour de France stages -- was just named, by the Tours' director,  as one of the greatest sprinters in Tour history and cycling.

The longtime drummer for No Doubt is going to be on the mend for a while -- 'cause his hand was all cut up, leaving him with a gnarly gash that'll take time to heal ... no doubt about it.

Adrian Young -- who's performed in the band for years -- suffered the injury Saturday at his home while preparing for dinner. Sources familiar with the situation tell us he was holding a glass in his hand when he tripped ... and the whole thing shattered in his palm.

As you can see from his graphic photo ... the cut ended up being pretty deep, as 2 big pieces of glass made their way inside. He was taken to the ER right afterward.

Crazy enough, the docs weren't able to get the glass out right then and there ... and actually recommended he undergo surgery to remove it all. So, that's what he's doing now ... preparing to go under the knife, in what we're told is a relatively minor procedure.

VP Kamala Harris is making history by getting a little taste of POTUS power, courtesy of President Joe Biden getting his colon checked out.

Remember the date ... Nov. 19, 2021 now marks the first time a woman's had Presidential power in the United States.

The Prez waved to reporters as he headed to Walter Reed Medical Center Friday morning for a routine checkup, which included a colonoscopy and required him to be under anesthesia.

The White House confirmed Biden did temporarily transfer power to the Veep while he underwent the procedure. To be clear, she wasn't sworn in as Prez ... she just had the legal right to make all decisions in place of POTUS.

Yeah, it's only for like 30 to 40 minutes, but still kind of a cool moment in history. Keep it in mind ... you'll win a trivia contest someday.

As for what VP Harris did with all that power? Not much, as far as we can tell -- she was NOT out and about Friday morning. Thursday she did host meetings with Canadian PM Justin Trudeau and Mexican Prez Lopez Obrador ... after they'd met with Biden.

Joe Exotic is going across several state lines as he continues to battle an "aggressive cancer," and while he's still in federal custody ... his new home will help cope with his condition.

Federal prison officials tell us Joe was transferred from FMC Fort Worth, TX to FMC Butner in North Carolina Tuesday. According to its website, Butner provides "extensive medical services" with a full hospital and cancer treatment facilities.

As we reported, Joe recently had a biopsy performed on his prostate which revealed an "aggressive cancer." It was late summer when Joe said he was "ready to die" after believing the cancer had spread to his pelvis and to his stomach.

The transfer just happens to come the same week "Tiger King 2" dropped on Netflix. Joe appears in the new season from behind bars, desperate to get out.

It's currently unclear what type of cancer treatments he'll undergo. Bernie Madoff, who suffered from kidney disease, was an inmate at FMC Butner before his death in April 2021.

Ty Montgomery horrifically dislocated his finger during the Saints' game Sunday ... and, yeah, look away now if you're squeamish.

The New Orleans tailback was running a route against the Titans in the first quarter of their weekend matchup when a ball clanked off his hands, sending him crashing to the ground arms first.

At some point during the play, Montgomery's digit got hit -- and you can see in the video from the game's broadcast, it bent in a way a finger never should.

Cameras showed the finger pointing 90 degrees away from his hand ... and, in fact, a little piece of bone even appeared to be exposed.

Montgomery left the game and was initially ruled as questionable to return -- but he never made it back into action ... and seems like a good bet dude will get a few more days off this week.

Tiger Woods has ditched the crutches and the walking aids ... but the golf superstar still has a noticeable limp in his gait -- new video shows.

Woods was spotted arriving at a hotel in Los Angeles on Sunday night ... and you can see in footage, his surgically repaired leg is still clearly far from 100 percent.

Woods walked gingerly as he headed out of his car and upstairs into the L.A. venue ... all while his leg was still encased in a compression sleeve.

As we previously reported, Woods seriously injured his right leg in a car crash in the Los Angeles area back on Feb. 23 -- and needed a rod, screws and pins to repair the damage.

Woods has made slow and steady progress since the surgery -- using crutches for months, before eventually putting his full body weight on the leg recently.

Tiger has been seen walking around golf courses following his son, Charlie ... though it's unclear if Woods has even remotely attempted a swing since the accident.

The "Rust" film worker who suffered horrific injuries from a spider bite on the job won't need to have his arm amputated ... and it sounds like he's going to get some workers' comp.

The film worker, Jason Miller, tells TMZ ... his left arm will be saved despite the grizzly photos of his severe reaction to a bite from a venomous brown recluse spider, which bit him while he was breaking down the movie set.

Jason, who is diabetic, says he underwent invasive surgery where doctors removed a bunch of muscle and skin from his left arm, but he's responding well to treatment and surgeries, so amputation is being ruled out after initial concerns he might lose his arm.

He says "Rust" should be held accountable for the poisonous spider bite in the wake of the fatal shooting of Halyna Hutchins ... and the wheels are in motion for him to get workers' compensation.

Jason claims he was getting dodged by folks at "Rust" after reaching out 6 times about workers' comp, but now his attorneys say they are working with the movie's insurance company to get him paid for his troubles.

While Jason says he greatly appreciates the wave of public support, with over $13K donated to his GoFundMe, he insists what happened to him was a freak accident ... and he wants the focus on Halyna Hutchins because he thinks her shooting death could have been avoided.

SZA wasn't about to relive Astroworld Fest all over again -- which is why she brought her latest concert to a dead halt ... just to make sure a fan who'd passed out was okay.

The singer was performing in Salt Lake City Thursday at the Union Event Center -- when at some point during the show ... she pumped the brakes on everything after noticing someone had apparently fainted out in the audience, and may have needed help.

This video was captured by a TikTok user and posted the next day ... and it shows SZA addressing what happened just last weekend in Houston, where she performed earlier in the day ... before mass casualties started to go down during Travis Scott's headlining set.

SZA says people passing out in crowds is quite common -- but what is abnormal is people dying ... and she says that's gotta change going forward, starting right then and there.

She actually forces stagehands to bring out water to the person in distress, and anyone else who may need to rehydrate. In a second video ... SZA starts to get flustered when nobody working in the venue promptly attends to the person who'd fallen unconscious -- and the crowd is fully behind her in her indignation.

It's pretty astonishing to see ... and as SZA alludes to herself, it may start to become the norm at live shows going forward, regardless of the crowd size. She seems to be saying that the artist should take responsibility if they see something ... and ditto for concert-goers.

As we reported ... a total of 9 people have died since the concert last Friday -- with one more on life support right now ... 9-year-old Ezra Blount, who was trampled in the chaos.

Sounds like SZA is putting her foot down on fans walking the line of life and death on her watch ... and won't let people fall victim to that, not as long as she can help it.

This is nuts.

MMA fighter Christian Lohsen of the Professional Fighters League just revealed he had to have a testicle removed after it ruptured during training this week ... and the crazy part??? He's already cracking jokes about it!!!

The 26-year-old out of Florida shared the cringeworthy news on Thursday ... saying, "So, last night was rough ... in a training accident I got my left testicle ruptured by a knee which led to it getting surgically removed."

Lohsen says the procedure went well and he's at home and recovering ... adding the loss will not result in loss of testosterone or ability to have kids.

While the incident sounds serious, Lohsen has maintained a sense of humor throughout the whole ordeal ... saying, "If I lose the other one however it's a different story, so from now on if you hit me in my last testicle we aren't friends ... lol."

The 9-2 fighter added a couple of clever hashtags ... saying, "#NoNutNovember #OneBallWonder #MMAIsADangerousGame #TookNoNutNovemberWayTooFar"

Lohsen has won 5 of his last 6 fights ... losing to J.J. Okanovich in the Dana White Contender Series in 2019.

Winter, the dolphin that grabbed global attention after being the focus of the movie "Dolphin Tale" is fighting for her life after developing a serious infection.

Winter, who lost her tail in 2005 at just 2 months old when it became entangled in a crab trap, had been cared for at The Clearwater Marine Aquarium in Florida for her entire life. Her caretakers announced that while they treated her for what they thought was a gastrointestinal infection, her condition got worse this week ... and she's now in critical condition.

"Dolphin Tale" -- released in 2011 -- was based on Winter's journey from her injury as a calf to the prosthetic tail that was made for her, and her progress after.

Among the movie's stars were Harry Connick Jr., Morgan Freeman, Ashley Judd and Kris Kristofferson.

The aquarium announced they'll be closed until at least Saturday "to create the best possible environment for her medical team."

A statement from the Clearwater aquarium team says, "We thank everyone for the incredible outpouring of love and support you have shown Winter since her rescue in 2005 and especially these last few days.”

A teenage girl was leveled by a sucker punch in the middle of a basketball game Sunday ... and the violent swing was all captured on video.

TMZ Sports has learned ... the incident went down during a youth basketball game in Garden Grove, Calif. -- after a 15-year-old had bumped into a girl following her jump shot.

In footage of the play, you can see as both girls got back to their feet after the collision -- someone from the crowd appeared to yell, "You better hit her."

That's when the girl in the all-black uniform swung a massive left haymaker that connected with the other girl's throat and face area.

Immediately, the girl crashed to the floor in pain ... and we're told the game was stopped and then eventually canceled over the incident.

The punch victim's mother tells us the girl was injured on the play -- and is suffering from the after-effects so much, she still has yet to return to school.

The girl's mom also tells us she went to cops over it all ... though it's unclear if a criminal investigation is underway.

Scores of lawsuits are sure to be filed in the coming weeks over the Astroworld Fest tragedy -- but would-be plaintiffs could hit a legal snag over something on the Live Nation website.

We're talking about liability here ... and whether Live Nation -- the promoter of Travis Scott's event -- is on the hook for it or not as plaintiffs rush to court to file claims against them and others.

On its face, LN may have an out on that front -- or at least a partial one, anyway -- due to a standard form they made everyone agree to before purchasing tickets from the Live Nation site ... It's the limitation of liability waiver most folks don't read ... but always have to accept.

We did some research, and as it turns out ... an ironclad liability waiver in Texas would almost certainly provide cover for basic negligence -- something we know for a fact concertgoers are alleging against LN in the suits we've seen thus far.

The online waiver reads in part, "You voluntarily assume all risks and danger incidental to the event for which the ticket is issued, whether occurring before, during or after the event, and you waive any claims for personal injury or death against us."

What it doesn't provide is protection against gross negligence, among other claims, which may well be brought forth in court as well.

With that said ... you'd think Live Nation might be in the clear here -- at least on the negligence front -- but not so fast. TMZ took a good hard look at the liability waiver, and it's quite possible they screwed themselves ... and might still be exposed.

Not to bog you down in legal mumbo jumbo -- but in Texas, in order for a liability waiver to be enforced to protect against negligence, there are a few things that must be met first.

The company has to feature clear language -- that your average Joe would understand -- directly addressing negligence in their waiver ... and from our check, Live Nation's Texas waiver does NOT seem to do this at all. Plus, the waiver itself is buried on their site -- which is another benchmark waivers have to clear ... ya gotta have it prominently displayed. In fact, there are clearly people who bought tickets without ever going to the website.

So, basically ... because Live Nation's liability waiver does not seem air-tight, it is NOT a foregone conclusion LN can wiggle out of liability in these mounting lawsuits.

Katey Sagal is still on the mend after she was hit by a car -- and these first pics of her since the accident make it seem like it's gonna be a while before she's on her 2 feet without assistance.

The "Sons of Anarchy" star was spotted Tuesday in L.A. going to and from her car with the help of a pair of crutches. It looks like she was entering a healthcare facility. We're told she appeared to be there for a doctor's appointment.

It's encouraging to see Katey is well enough to walk around ... and there's no sign of a cast or walking boot either.

TMZ broke the story ... cops say Katey got clipped by a Tesla about a month ago while crossing the street, this as the driver was making a left turn.

The person got out of the vehicle to attend to her, and she was ultimately taken away by ambulance. The police did not cite or arrest the driver at the time -- as it would appear it was nothing but an accident.

We were told they were investigating the matter further, but since then no charges have been filed.

Good news from Deion Sanders -- the Jackson State football coach just gave an update on his current status after suffering complications from foot surgery ... and he's out of the hospital!!

Coach Sanders recently had a setback during recovery from surgery he had on his dislocated toe -- an injury from his NFL days -- back in September.

The 54-year-old has been sharing updates in the weeks following the procedure ... even posting bloody and gnarly images.

Sanders was told to chill for 6 weeks, but he was out and about via a 3-wheel scooter and golf cart during team drills and games -- until he was sidelined again by medical professionals.

It seemed serious since he ended up back in the hospital and missed JSU Tigers' last three games due to complications ... but Coach Sanders just announced on Wednesday everything is good.

"As you know there have been some complications following my foot surgery, but it brings me such joy to tell you that I'm now out of the hospital and on my path that we started TOGETHER."

"I promise you I'm going to be smart and continue to adhere to my wonderful team of doctors' orders."

Sanders added, "Often times fast is looked upon as having speed, but fast in this instance is being fleet of thought."

Sanders also says he might make an appearance very soon -- in a better ride ... saying "Don't be surprised when you see me back on the field in a new whip 😎"

What can beat a custom-made Prime Time scooter and golf cart?!