That guy is awesome!
That looks like my younger days with my cousins riding along the river trails - except for that wall on the middle of the bridge ramp - we didn't have that. That would be an awesome event to do or be a spectator. I grew up doing Hare Scrambles that would run all day. The main thing, if you notice, is to not slow down in the wrong spot. That, and get around the morons who are trying to push their bikes thru the stump section.