When I first watched the video of this tank/Skateboard (video after the break) I thought, what a great idea. But after watching I wondered why all of the engineering and design when you could just use a motocross motorcycle?! Not to mention you look like you are on a hopped up Segway, and you know how we feel about Segways.
Either way the BPG-WERKS DTV (Dual Tracked Vehicle) Shredder is pretty cool, not sure of a practical use, but would be a lot of fun to rush around at 30MPH after a few beers.