I love this style of urban obstacle training, moving your own body weight powerfully through obstacles. This is an excellent video.
http://www.youtube.com/watch?v=t88CLZe0EFg
By far the best one-arm pull up form I have ever seen. Slow and strict. Check out the Shenanigans after he is done doing one pullup with each arm. This guy has a whole series of these videos of him doing pull ups and muscle ups. Very impressive strength to body weight ratio.