I have always wanted to try this!
1. Get a pickle.
2. Jam electrical wires into opposite ends of said pickle.
3. Plug wires into AC socket.
Notice, “Plug in…” comes LAST! Keep in mind, you are dealing with LIVE AC! Use common sense and all possible caution! I grabbed ahold of one of the wires while discussing it infront of a group of Physics Pholks at Rutgers a few years back and got a rude awakening! Made the demo much more interesting for the audience, but ruined my day (not to mention my shorts…). – Link
Update: Here’s a video I found of it working and here’s a link to an explanation.
Something from the comments- FYI: I would recommend doing it in a well-ventilated room. Electrified pickle is… aweful.