tinfoil in teh microwave. Preferably a bag of chickenwings from a deli. I've done that one before,. People should have told me you can't microwave those tinfoil bags.
I remember them doing somethign like this on AOTS. They pulled the disc out and it looked like an assembled puzzle on the back with all the fry marks. It was funny
meh if yu want to see something really good, get a 2 litre coke bottle and quarter fill it with rubbing alcohol, then get some solid chlorine (the pool tabs work best), now before you put the chlorine in the bottle and in the microwave. Now make sure the microwave is already on with the door open and you have some one to put the lid on quick because you have like 10 seconds to run before it blows your arm off. Also make sure you have a ditch to jump into to stop yourself getting covered in shrapnal. some videos, sans the microwave: 1 2 3 4 you may get a better reaction if you rap the bottle with tin foil but I haven't tryed it with it though
you can also but two wads of tin foild near eachother in the mic and they'll send electric charges to ea other