Nurse!

Jeremy Piven opened his car door Tuesday -- no big deal. Problem was ... he didn't look first and a bicyclist slammed into the door, cutting his chest open.

Law enforcement sources tell TMZ ... Jeremy was near The Grove when he parked his car next to the curb and flung open the door of his 2015 CTS Cadillac. The 44-year-old man who was peddling along was badly hurt and taken to the hospital by ambulance.

Our cop sources say they believe Jeremy was at fault but he didn't get a ticket because cops didn't see it happen. We're told Jeremy was cooperative.

The victim received stitches on his chest. Too early to know about a civil suit, but you can bet on it.

Shannen Doherty revealed a telltale sign her fight with breast cancer won't be ending anytime soon.

Doherty got her head shaved and posted photos of the heart-wrenching process. Her mother and friend were with her through the ordeal.

45-year-old Shannen was diagnosed last year. She sued her former business managers, blaming them for the severity of her cancer. She claims they screwed up her insurance, which delayed her diagnosis and treatment.

Despite the large painful dent in his forehead, MMA fighter Evangelista "Cyborg" Santos says he wants to fight again ... IN 3 MONTHS!!!

We spoke to Santos' ex-wife, Cris "Cyborg" Justino, -- who says she spoke with Santos Monday and insists he's doing well after suffering the brutal injury from a flying knee on Saturday at Bellator 158.

Justino says ... Santos is talking normal and already making plans to fly to Houston to undergo surgery on his head. She also told us Santos' life is not in danger.

But the craziest part ... Santos is already talking about scheduling ANOTHER fight before the end of the year!

Will it happen? Justino tells us the doctors haven't ruled out a comeback fight ... but it might take some time.

Meantime, Justino launched a GoFundMe page to help her ex with his medical costs.

Six Flags is being sued by a woman who claims the park paired her with a fat person on a ride that became overloaded and dangerous ... and as a result she ended up in the O.R.

Nakia Razey claims in a new lawsuit ... she went to Six Flags Over Georgia Hurricane Harbor water park last year and tried out the Bonzai Pipeline ride. It's pretty scary ... hurling riders on a raft down a slide with a 4-story drop and multiple rapid turns before dumping them into a splash pool.

Here's the problem. Razey claims the park loaded her into a raft with a 250-pound guest, and that person's weight severely overloaded the craft. She says it swayed violently, slamming her into the interior of the tube and causing severe injuries.

Razey says she was taken by ambulance to a hospital and right into the operating room.

She wants money and so does her husband, for loss of affection as a result of her injuries.

Tony Robbins insisted on 'GMA' Monday that no one was injured when they walked on hot coals during one of his seminars ... but that's certainly not the way it sounds from the 911 calls.

TMZ has obtained tape of several 911 calls, in which people on scene describe what they see. A woman, who says she's a security dispatch officer at the convention center where Robbins held the fire walk, described 3 injured people and "very bad burns."

Another caller said her husband and others were burned and they needed more ambulances.

Tony claimed on the morning show no one was really injured, and brushed off the complaints as nothing more than blisters.

According to initial reports, more than 30 people were burned by walking on the coals, and 5 were hospitalized.

Alice Cooper broke the news on his bandmate Joe Perry's condition ... and it's serious enough that the group's immediate future is uncertain.

The Hollywood Vampires frontman looked visibly shaken Monday while leaving his NYC hotel. As we previously reported Perry suffered what appeared to be a cardiac arrest during the band's Sunday night show in Coney Island.

Perry is currently hospitalized and someone tweeted from his account that the guitar great was in stable condition.

Lil Wayne's epilepsy continues to dog him ... we've learned he was hospitalized last week after suffering a severe seizure.

Wayne has been unable to get his recent seizures under control. You'll recall just last month his plane made 2 emergency landings after he had a series of seizures on the aircraft.

The seizure last week was bad enough that he had to cancel his performance at TAO nightclub in Vegas for a pre-UFC 200 party. Wayne was just moments away from taking the stage when the seizure hit.

We're told Wayne has chalked it up to a medication issue ... that doctors were having trouble figuring out the right balance of Rx.

After a stint in the ICU, Wayne was released and is now resting in Miami.

Joe Perry was just rushed to the hospital after collapsing backstage during a concert in NYC ... TMZ has learned.

NYPD sources tell us the Aerosmith guitarist was playing with Johnny Depp and Alice Cooper in their band, Hollywood Vampires, Sunday at the Coney Island Boardwalk when he allegedly went into cardiac arrest.

One person in the audience caught video of what appeared to be Perry staggering behind a speaker mid performance.

The 65-year-old guitarist was taken to a nearby hospital and is in stable condition.

Story developing ...

Kim and Kyle Richards are being sued by a stylist who claims Kim's pit bull viciously attacked her and Kim refused to call 911 unless the woman lied to protect the dog.

Paige Sanderson says in a new lawsuit -- obtained by TMZ -- she went to Kyle's house in April to help Kim dress for a promotional appearance for 'Real Housewives of Beverly Hills.'

Sanderson says when she saw Kim's pit bull, Kingsley, she became fearful and ran into a bathroom. She says she was assured the dog was docile, so she came out and says Kingsley went ham.

Sanderson says the dog lunged at her, bit and held on to her lower abdomen and crotch, tearing off her leggings and underwear and ripping out portions of flesh.

From there she says it only got worse. According to the lawsuit, Kim refused to call 911 unless Sanderson lied to EMT's by blaming the attack on a stray dog ... not Kingsley.

Kingsley has a history of attacking. The dog bit Kyle's daughter, Alexia, in November 2014, sending her to the hospital. The dog also attacked a dog trainer and an 80-year-old woman.

The stuntman Tom Sizemore ran over should make a full recovery ... we've learned his injuries were not as massive as first thought.

A rep for the actor tells TMZ the "Shooter" stuntman suffered 2 broken ribs and a wrist ... requiring surgery. A production source backs up the medical assessment.

TMZ broke the story ... Sizemore was behind the wheel when he hit the gas on a Cadillac SUV, running over and pinning the stuntman. He was airlifted to a local hospital.

Production sources say Tom was only supposed to jump in the vehicle ... not drive it. Tom says that's not true ... the scene called for him to drive away.

2:55 PM PT -- Sizemore's rep tells TMZ the stunt coordinator prompted him to "pull out" once he got in the SUV. He says 3 cars pulled out at once. Tom, who was driving the SUV with Omar Epps, says he followed instructions, drove off and never saw the stuntman before hearing a "thump."

A stuntman in a new TV show was badly hurt Wednesday after being struck by and pinned under an SUV, which we're told was being driven by Tom Sizemore ... TMZ has learned.

"Shooter" was being filmed at Agua Dulce Airport ... near Los Angeles, where they were filming a sniper scene. We're told Tom was supposed to run into the Cadillac SUV and just sit there until the scene ended, but he put the vehicle in reverse, hit the gas, and ran over the stuntman.

Eyewitnesses tell TMZ ... 8 guys on the set tried in vain to lift the car off the stuntman. Someone finally brought in some equipment and they were able to jack the car up and free the man.

According to one first responder, the stuntman "is in real bad shape." He was airlifted to a nearby hospital. His condition is unknown.

The show stars Ryan Phillippe, Omar Epps and Sizemore.

Chelsea Manning's attorney is accusing the Army of outright lying to cover up what appears to be a suicide attempt behind bars.

Attorney Nancy Hollander tells TMZ she and her team had been cleared to have a routine call with Chelsea Tuesday afternoon, but when they called in they were told there were problems connecting the call. The staff at Leavenworth made no mention of a suicide attempt.

Hollander says she's been trying in vain to get in touch after we posted a story that Chelsea apparently tried hanging herself in her cell early Tuesday morning.

Now Hollander says she's been informed she cannot even talk to Chelsea until Friday at the earliest.

Chelsea Manning, who's serving a 35-year sentence for leaking classified military documents, was in a prison hospital and our sources say it was the result of a suicide attempt.

We're told the incident occurred early Tuesday at Fort Leavenworth, Kansas prison. We do not know specifically what Manning did in her cell, but one source tells TMZ she tried to hang herself.

Prison officials tell TMZ although she has been released from the hospital she is being "monitored."

Manning was convicted on 20 counts of espionage, for passing classified docs to WikiLeaks.

Manning transitioned from male to female behind bars.

Paris Jackson apparently saw our story Monday -- that she's cut off all contact with her mom, Debbie Rowe, who's now battling breast cancer -- because we've learned Paris just contacted Debbie and proclaimed her love ... this according to Jackson family sources.

As we reported, Paris broke off contact with Debbie more than a year ago. We're told Paris' family was upset MJ's daughter had reconnected with Debbie after the singer's death and became close. On top of that, when Paris began acting out Debbie became the disciplinarian ... something Paris didn't like.

Debbie was diagnosed with breast cancer recently and will undergo surgery. We're told Paris texted Debbie, "I love you," and it appears the 2 will meet up after the surgery.

Playboy Playmate Kayla Collins is lucky to be alive today, after her car flipped multiple times on the streets of Hollywood.

Miss August 2008 was driving Sunday night when a car struck her Audi, sending it flying in the air and flipping 3 times.

Miraculously, Kayla did not suffer serious injuries.

She should do an Audi commercial.

Michael Jackson's ex-wife has breast cancer, and their estranged daughter doesn't even know.

We've learned Debbie Rowe was diagnosed recently and will undergo surgery in the next week, but her daughter, 18-year-old Paris Jackson, has no idea because she broke all contact with her mom more than a year ago.

Rowe has all but given up on salvaging the relationship. After Michael died, Debbie and Paris got extremely close, to the point it created friction with the rest of the family.

When Paris began dealing with her own problems, the relationship fell apart. Rowe believes the family influenced their daughter and drove a wedge.