Movie line answers have been posted (finally). My all-time favorite four are 1, 2, 4, and 5, so it makes me happy that so many people guessed them. (Especially Arsenic and Old Lace; half of the time it seems like I am the only person in the world who has seen that movie, and it is so sad.)
Brutal honesty meme time again, apparently! Have at me. (eta: now with CORRECT LINK, ahaha wow.)
... I feel like I should have a third link here to round things out, so, here, by way of
defenestration:
David Caruso delivering a bunch of one-liners in the exact same way. Good times!