Awesome exhilarating sport! What a surefire way to first lose a limb due to high-speed contact with a cliff, and then go down like a spectacular spinning ball of pain and blood because your aerodynamics got fuked UP. See, you lose a limb->you lose a wingflap, it's a beautifully conceived and truly horrible way to die.
It's as if some magnificent bastard thought 'Hmm, it's not fair that the malfunctioning skydivers feel no pain until they hit the ground' and decided to MUTHAFUKIN' RECTIFY.