Adam Sandler Threatens to Leave 'Late Show' for 'Jimmy Fallon' (VIDEO)

Adam Sandler got pretty impatient with David Letterman on 'Late Show' (weeknights, 11:35PM on CBS). The comedian appeared from backstage to tell Letterman to hurry his introduction up because he wants to get out on stage.

"I'll go over to [Jimmy] Fallon if you want," Sandler said. "It's up to you, but I gotta get out there." Letterman warned Sandler not to leave because the set of 'Late Night with Jimmy Fallon' doesn't have air conditioning.

It's hot and muggy in New York, so what does Sandler do? Stay, of course.