At the end of the fourth stage of Earthworm Jim 2, there's a "game show" where you can get power-ups by answering ridiculous multiple choice questions correctly. I ran across a website yesterday that has all of them on it, along with the right answers. While reading through them, I found the question, "would you like that on account or gift certificate?"
Not ground-breaking, certainly, but I figure it's something most folks don't know about.
(Incidentally, the "correct" answer is, "on account of I'm cool.")