According to some people who've worked with him, Jim Carey's a bit of an ass clown...
A while back, he was supposed to be making a movie in which there was a scene where he would be in a wrestling match against Jerry 'the King' Lawler...the thing is, the scene had been planned with Jerry delivering the actual wrestling moves to Carey, until, on the day of shooting, Carey's agents told the director if that happened then they would sue Jerry for endangering their client...
Jerry, not wanting to be sued obviously, tried to work around this problem by speaking with the directer about getting a stunt double in for Carey...Carey, however, was having none of it, and had what is described by all who witnessed it as "a hissy fit"

He started screaming in the middle of the ring about it, until someone advised Jerry to leave until he'd calmed down...which Jerry did, until Carey decided to walk up, and actually spit in Jerry's face as he was stepping out of the ring...
It took Carey some three seconds of looking at a 240lbs man wiping spit from his face to realise he had made a big mistake, and try to run away. Jerry however became so furious he ran after him, and locked on a sleeper hold that very nearly made Carey pass out...
Now, on the set, there was a bodyguard working for Jim Carey who tried to rush to the rescue...and he reached under the bottom rope to grab a hold of Carey's feet, and tried to pull him out...and a strange tug-o-war ensued with Jerry holding Carey around the neck, and another guy about the same size pulling on his ankles.
After a minute or so, Jerry let him go...only, the other 200+lbs man was still pulling, and the result was Carey was dragged out of the ring at dangerous speed and, already unconscious, smashed his head against the floor on the outside of the ring.
I can't exactly remember how the story ends...but I'm pretty confident that Mr. Lawler and Mr. Carey did not finish the movie together