Using a simple physics equation, D=.5at^2, we can solve this here dilema. The acceleration is 9.81m/s^2 and I timed his fall to be 2.94s. This means he fell 42.4 verticle meters or 139.2 feet. If this slope was about a 45 degree he would have fallen around 196.9 feet down the hill. I think it's safe to say this was a pretty sick jump.