Massive Bar Fight at Joker's Bar and Grill

This fight proves beyond a shadow of a doubt ... the Joker's wild.

Check out the insane brawl at Joker's Bar and Grill in Maryland, where COVID didn't get its ass kicked -- it's alive and well -- but some bar patrons sure did, as they piled on top of each other and pounded away.

It's unclear what triggered the fight, but you hear lots of screaming as a scuffle starts in the back and then all hell breaks loose.

There's a dude pinned down on the pool table with 7 bar patrons surrounding him. Hard to tell, but it looks like he's being choked.

You also hear glass shattering ... almost like in a western flick. Once the glass goes, there's fighting all over the bar. Someone eventually orders everyone to stop, and it's crazy, because they are still fighting as they move toward the door.

Maryland has been hit hard by COVID -- over 112,883 cases and 3,660 deaths.