That was a true pleasure to watch! I love watching folks who are true masters on two wheels. I loved the part where he was riding on a thin rail - all you saw were the bottom portions of his wheels - with the "Police Station" sign in the background. Cracked me up!
I've seen quite a few videos of stuff like that, both on bicycle and motorcycle, but that lands in the number one or two spot. One of the most incredible things I've seen on a motorcycle was something Travis Pastrana did. Mind you, I've seen all the back flips, etc, etc, etc, but for some reason, this trick he did just blew my mind. He took a HUGE jump (had to have been at least a 100 footer) and flew through the air without a trick. But when he landed, he landed on his front wheel and rode it (stoppie/end-o style) till the bike came to a complete stop before the rear wheel touched the ground. It was really pretty amazing.