Really beautiful video.
Also, it seems that this guy was maybe responsible for "Crazy Frog" (... remember the Crazy Frog X'mas song?)
Not meaning to pick holes, especially after such a great video, but he did make at least one minor physics mistake in his
description of Verona Rupes on Miranda, where he states Miranda's gravity as 0.018g (or 0.176 m/s/s), which would get you to the bottom in only 4 minutes (with a final velocity > 150 km/h), rather than the more leisurely 12 minutes he suggests.
In fact, Miranda's surface gravity is 0.079
m/s/s (or: ~ 0.008g) according to:
http://en.wikipedia.org/wiki/Miranda_%28moon%29, which by my calculation would result in a fall from that height lasting only about 6 minutes with a final velocity of only 28 m/s (~ 100 km/h) which I guess might well be halted by a "small" rocket as he describes.

PS. Feel free to check my calcs...