I still remember a student's nervy, ill-advised singing that ostensibly gave the rest of a class the first eight answers to a test. While the teacher was out of the room, a student ran up to his desk, looked at the answer key to a multiple choice test we were about to take, and memorized, or at least pretended to memorize, the first eight answers. He then walked back to his own desk, singing a tune that went something like, "Oh, yeah, I'm singin' C, B, D, A, A, D, B, C!" In case anyone didn't catch on the first time, he sang it again, just before the teacher reappeared.
I don't remember if the answers he sang were correct. I didn't trust him completely, however, so it wouldn't have surprised me if he'd sung out the wrong answers, just to throw people off.
