Funniest Joke?
I think this line from Drake & Josh: Two Idiots and a Baby (#1.4)" (2004)
Josh Nichols: [dangling from the roof] I deserve this. This is all because I forgot to feed my pet turtle, Sheldon in kindergarten. He went to heaven, and now my life is bad.
Josh Nichols: [shouts] You happy, Sheldon? We're even now!