If he was a little kid, I'd have felt terrible. I'm not an insensitive monster, ok sometimes..
He flew at a vert wall obviously with the intention of riding the tranny and doing something cool. No helmet, and he
totally missed. Throwing yourself a wall and missing is good comedy. I'm glad he was ok though, I'd not have laughed if he had been seriously hurt. I'd have been pissed if my buds just stood around and kept filming, shoulda spit blood and teeth at them. I knocked my two fronts out as well(swallowed one at 6yrs) in a high speed wagon (pushed by big neighbour kid), and push car collision.
Deceleration trama at it's finest.