My friend Forrest...well...what can I say? He's a genius. He's also an artist...and an engineering wizard. When you put all those things together in one person, you get stuff like this:
Not to mention this:
Is your mind blown yet? But wait! One more:
Here's his YouTube channel:
If I were you, I would subscribe to it or check it often--his brain is always producing amazing new things. His moniker on YouTube is kineticstuff1.
Edited on 5/23/12 to add: Sigh...YouTube has given Forrest so much grief that he took his videos down for now. I hope they will resolve the issue soon and Forrest can once again post his magnificent videos!