wow

looks like a crazy ride to me

 LOL! That's awesome. I wonder if it improves lap times..

http://www.youtube.com/watch?v=sFCRh-anfRg&feature=related 

http://www.youtube.com/watch?v=BFw763FJmm4

This is home made and is better imho

Edit: This guy has his whole setup explained and with everything you need to know and how to even go about building the same thing should a person want to go that route. My personal opinion I would want to build one myself but space for me is limited right now so its a no go. Once I move to a larger house then i will consider building some thing of the sort. My design would be a lot different to his though. The principles will be the same, he started using wiper motors out of a car and then eventually switched to linear actuators.