The key to faking out the parents is the clammy hands. It's a good non-specific symptom. I'm a big believer in it. A lot of people will tell you a good phoney fever is a deadlock, but you get a nervous mother, you could wind up in a doctor's office—that's worse than school. You fake a stomach cramp, and when you're bent over, moaning and wailing, you lick your palms. It's a little childish and stupid, but then again, so is high school.