Have seen both these videos about 100 times & still find them awesome. Second video is a little cooler:)
http://www.youtube.com/watch?v=TXdsqWqR4ro
http://www.youtube.com/watch?v=TXdsqWqR4ro
http://www.youtube.com/watch?v=WJkg6j7IkyE
http://www.youtube.com/watch?v=WJkg6j7IkyE
0:34 gives me goosebumbs:o