Static is the best way to go. Avoid magnets in your system box as this will probably corrupt your hard drisk and any other magnetic storage device nearby.
All you need is to take the side panel off, rub your hair with a balloon and keep touching metal bits of your computer. After a few minutes of doing that, try and boot your computer. Repeat until computer wont boot!
Try poking the BIOS chip.
Failing that, try breaking one of the tracks.. altho this is more obvious so u will have to be a bit sneaky and try and hide it
NOTE: I take no responsibility for you, or anyone else, looking like an idiot while doing anything with a balloon!
ANOTHER NOTE: I take no responsibility for anything!