LOL it may sound weird but i did make a plasma motor using a think geek plasma mug, and a neodymium magnet. And the best part is that you DON'T HAVE TO DESTROY ANY OF YOUR GOODIES!
heres a video of it in action.
Step 1: Parts or uh stuff you need
Well you'll need these things which can (for the most part) be obtained by think geek:
Plasma mug: uhh i think its discontinued
Curiously Strong Magnets: http://www.thinkgeek.com/geektoys/science/770f/
get the larger sized magnets ( i used my own magnet it was stronger)
An altiods tin : can't get it from Think Geek
Step 2: Assembly
Put a magnet cube on the bottom of the altoids tin
Put the tin on top of the mug
put the mug on the coster
turn it on
Step 3: WHATS WRONG WITH IT?
Nothing, if it looks like an orange blur you did it, this is because its spinning so fast it becomes a POV effect and we can no longer see the towers of plasma.
Sorry i can't scan a picture while its running and i have no camera.
Step 4: Fun time!
Now that it works lets do some fun expirments.
1) put your finger on the side of the glass, it will stop spinning. moving your finger up and down will allow you to adjust it and start it up again at a slower rate.
2) Put your finger on the altoids tin, it stops spinning right?
3) Slow it down, to do this lift the tin upward slowing notice how it slows down and ultimately stops.
Step 5: Safety
DO NOT TAKE APART THE COASTER! ITS HIGH VOLTAGE HIGH CURRENT! ENOUGH TO KILL!