On the AV Club, actor Curtis Armstrong, aka "Booger" from Revenge Of The Nerds, Herbert Viola from Moonlighting and "Snot" on American Dad, talks about making a movie with famed lunatic Gary Busey:

Quigley (2003)—“Dexter Pearlsley”
CA: Oh my God.

AVC: Yeah, sorry for dragging this one up. But this was a movie where you appeared alongside Gary Busey, who plays a software tycoon who dies and is reincarnated as a dog. Busey’s such a weirdo force-of-nature that we have to ask about working with him.

CA: It was just what you’d imagine. That’s about the best way to put it. We were shooting this movie—which is a horrible movie—and he was supposed to come back from the dead. And he of course, Gary Busey, supposedly had done this—he’d been in an accident and died and came back. He showed up on a set made to look like Heaven, and he looked around and said, “I can’t play this scene.” They were three days behind at this point. But Busey said, “It’s nothing like this. I’ve been to Heaven and it doesn’t look like this. That sofa’s all wrong. That mirror is ridiculous. They don’t even have mirrors!” It was ridiculous. He was completely nuts about the design of Heaven.

But then on top of it, one of the guys playing an angel, had also died and come back. And this guy got into an argument with Busey about the way Heaven looked! The two of them wound up coming to blows and they had to send everybody home. So there you go. That’s what we were working with.

That sounds awesome!