Totally still scared of Dennis Quaid even if this is staged.

"I am a pro!" (screenshot via TMZ)

Dennis Quaid, an actor you may remember from movies like The Big Easy and Breaking Away (or, if you're not into movies your parents like, that TV show Vegas, I guess) completely melted down on the set of a film. It's an expletive-filled rant that was not at all staged, even though TMZ immediately claimed it was probably a stunt just hours after posting about it. Some are saying it's another Kimmel prank, but my money is on a surprise return of Tom Green's show. Here's the clip (NSFW: language). It's scary even though it might not be real:

Sources: TMZ