Very cool madmedia. I do a lot of motorsport and we have one driver who does stuff similar to this - fanging inside disused railway repair yards, sideways through tight fixed pillars and the like - so I know how hard this guy is pushing!
Slow mo stuff is lovely - although I didn't think the balloons worked that well, which was kind of sad.
Best of all was the cut of the ride though - quite invisible - which is exactly what you want.