The truth behind Dennis Quaid’s infamous on-set meltdown is finally revealed. ” The Full Video! “Funny or Die

Dennis Quaid really did freak out on a movie set — but it was the set of a “Funny or Die” video.

The site finally copped to shooting the scene with Dennis … by posting the full video showing Dennis losing it on the director and the crew of a fictional set. But now you can see the full skit which includes some hysterical sight gags.

The video leaked earlier this week … just showing Dennis losing his marbles. He kept tight-lipped about it.

So … not a real freak out, just real funny.