My favorite scene, from my favorite Scorsese film. According to Scorsese's bio, by Roger Ebert, the scene was very much ad-libbed by Keitel and DeNiro. Keitel says he felt DeNiro was giving him a little "Abbott and Costello," kind of tongue-in-cheek, so Keitel decided to run with it.

DeNiro has great "straight man" comic ability. Who would've known?

"Analyze That," the dreadful sequel to the great "Analyze This," had one gut-busting moment. DeNiro is with a hooker in Billy Crystal's guest bedroom and they're making all kinds of, er, noise. Well, Billy calls DeNiro into the foyer and says, "Paul, I have a 17 year old son in the house!," to which DeNiro replies, "I'll ask her," with a dead serious expression on his face .

Hysterical.