Need 4 speed
I've seen a lot of these wing suit clips on youtube but this one just blew me away. First they fly under some electricity wires then between a cliff and a tree but the gorge has to take the biscuit. It seems total madness but i guess they have more control than it appears. I looked up some facts on wikipedia and found out that the vertical component of their velocity can be as little as 40km/hr, that's not that fast compared to the terminal velocity for a free-fall parachutist which is more like 200km/hr. however they move 2.5m forward for every 1m down so the forward velocity is around 100km/hr. This means they can fly parallel to the ground on a 25° slope. The routes are mapped on GPS and so they can compare flights and get closer to objects like trees and rocks. Now I think its time to put my head back in the fridge.