Legal note: this is supposed to be a joke. Don't ever stick a fork (or any other cutlery) in an electric outlet.

What is needed

What to do

What is happening

Cats, and other fuzzy objects, will build up static when drawn across a carpet. You might see sparks flashing between the two! Static forms because of this: when different materials (say, carpet and cat fur) are in contact, one might have a greater liking for electrons than the other. It will then pull electrons away. This means that one material will end up with too many electrons, and the other too little. By moving the cat across the carpet, you increase the area of fur exposed to the carpet, and so you increase the charge transferred until ZAP! Sparks fly!