I've done this with friends of mine in the past. I recentely was joking around some and a friend said "You're a funny guy!" and I tried the whole thing on him. I don't think I got as extreme as the others, I just went on "How am I funny? Am I here to amuse you, like a clown?" and then told 'em where it's from. What has actually gotten kind of annoying is recentely I was with my friends and we were discussing a rumor and I said "I heard things...I heard some things" repeatedly in a De Niro voice and they don't know where it's from and have started mocking me with it, without even giving me a chance to explain to them where it's from. This also continued when I noticed the same friend staring at me and I said again ina De Niro voice "You were givin me look...You...You were giving me a look" and the same thing happened. Oh well, hopefully they'll see the flicks some day.