"Adam Sandler, in his meeting with Lorne ['Saturday Night Live' producer Lorne Michaels], humped a chair and had him laughing so hard, he signed him on the spot."
[A similar story is told of Robin Williams.]
["At age 11, Adam Sandler got up to sing at (sister) Elizabeth's wedding, performing Ringo Starr's 'You're Sixteen' to huge applause. Overly enthused, he then broke into 'Yesterday,' and was roundly booed for trying to be the centre of attention. This was always the way with Sandler. You love him or you hate him."]
Sources
Will Ferrell in Esquire, Dec. 2003, p. 165; tiscali.co.uk, Adam Sandler bio