HAaaaaaaaa! My buddy worked at a hotel which I shall not name in a city I shall not name. During a film festival, Busey and another (lesser known) actor were in the elevator with him. Noone spoke. My friend later got the room number of the lesser known guy and pranked him: "do you know who this is you fucking piece of shit? This is Gary Busey. You fucking think you're better than me?" etc etc. The guy was apologizing and on the verge of tears. He was threatening to go down and fuck the guy up . Good times...

Edit: He also pranked Bea Arthur and a few other b-listers...