My all time favorite is from “JFK”, where the John Candy character is trying to persuade his friend Jim Garrison, played by Keven Costner, to drop his case. He tells Garrison, “Forget about it, man! Oswald did it! You’re backing a dead man Daddyo, the Government’s still breathin’! And they’re gonna jump up and down on your head, and yell cocka doddle doo!”