Use a flashlight and an old floppy disk as a TV remote

Change TV Channels Without A Remote! - The best bloopers are here
This is a really cool video showing the use of a maglight and an old floppy disk to change channels. I don't know enough about how TV remotes work to understand why this method works, but it is cool anyway. I think I might just go out and buy a flashlight tonight to try this out.

Via Geeks Are Sexy: Change channels with a flashlight and a floppy disk