Well i've recently discovered an easy and sometimes hilarious way to pass time when im bored in a university class. Newer HP laptops have a remote that comes with them to adjust volume, turn the screen off an on, mute/unmute, launch quickplay/windows media center etc.
Well I also found out that it works for almost every HP laptop made this year, even the ones that didn't come with a remote so it can be done to anyones computer. If there watching youtube video or talking on msn you can crank or unmute their volume.
It's a dick move I know but the only thing I ever do is launch Quickplay to see their reaction. One chick ran a virus check the first time I did it. There's so much potential.