I've been getting more into XC mountain biking over the last few years, and while I am generally keen to keep both wheels on the ground most of the time, I've been at a couple of parks (eg. Duthie Hill in Issaquah, WA) where some of the guys riding there are doing some really incredible and crazy jumps.
Take that to the extreme, and you get Danny Macaskill. It sure is amazing to see someone pushing themselves to the absolute upper limit of this sport. What an incredible film, and one of the best Danny Macaskill movies I've seen. Truly incredible!