You'll find that sarcasm is more effective if you don't giggle it out like a naughty schoolgirl.
"It can truly be said, that I have a BAT in my belfry."
Nope, Willy Wonka in Charlie and the Chocolate Factory actually! The scene where Augustus Gloop gets stuck in the pipe. My wife actually used it on one of the kids thismorning as they were getting lunches ready for school.