Bad Idea Jeans
A few weeks ago I bought a green laser pointer from ThinkGeek for no good reason. It's really very impressive and I played with it intently for 45 minutes before losing it in a desk drawer somewhere. During that time, I performed a little thought experiment: "I wonder what would happen", I thought, "if I pointed it at a passing airplane?"
It seems that somebody has actually run the experiment and the results are exactly as I'd imagined.