Cool stuff. Here's a few videos of that.
http://www.youtube.com/watch?v=usKFoZ244sk&feature=related
http://www.youtube.com/watch?v=Opb7KLju5Us&feature=related
-AM
http://www.youtube.com/watch?v=usKFoZ244sk&feature=related
http://www.youtube.com/watch?v=Opb7KLju5Us&feature=related
-AM