Look at this. Amazing what you can do by deleting some frames: http://www.compfused.com/directlink/963/ Saudi Drifting contests: http://www.compfused.com/directlink/966/ A mixture of spider man and Jackie Chan: http://www.compfused.com/directlink/1057/
That first one is very strange, yet funny. Your right, all they did was delete the frames inbetween when they jumped.
the spiderman one is an extreme sport called Parkour , and the guy is a good parkourist... the other videos are awesome