Jeff Herbertson is a pretty darn good mountain biker. And he demonstrates his awesome ability quite spectacularly in this incredible video. Caught on his bike-mounted GoPro camera, Herbertson slaloms through rocky terrain at the Grand Canyon with unbelievable precision and skill. If that’s not impressive enough, at one point he even does a 73 FOOT … Continue reading Watch Stunt Biker BACKFLIP 73ft Gap Over Grand Canyon!