CD in a Microwave (also, a viable use for “Join AOL” CDs)
Have you tried it? Looks like a fireworks display, with all these sparks arcing in a circular pattern around the disc. I don’t suggest frying the disk for more than 2-3 seconds after it starts sparking, though. :) In fact, I don’t suggest it at all, so don’t blame me if your microwave explodes, causing its door to blow off its hinges and decapitate you.
I saw this when I was doing work experience at a local ISP. The boss, running the ISP from his house, all of sudden turned to me during the day and said, “Hey, have you seen a CD in a microwave?”
“Huh?”
“Come around, I’ll show you.” And indeed he did. I just stood there shaking my head as he shut off the microwave, fanning the fumes from it, “gotta get rid of the smell… my wife’d kill me if she found out.”
11:55pm (GMT +10.00) 
