Most of those sorts of options will do more harm than good. If you've ever attempted to skydive (or fly in a wind tunnel), you know that the slightest move of o

Most of those sorts of options will do more harm than good. If you've ever attempted to skydive (or fly in a wind tunnel), you know that the slightest move of one's hand can cause instability, or a spin. It takes a lot of experience to gain enough control to be able to really fly your body (and in the dead air at the altitude of this jump, all previous bets are off). Adding any sort of wings, fins, or whatnot would cause more uncertainty than it would certainty. (This is why wingsuits are so dangerous to fly - the extra surface area means that the subtlest of moves are magnified significantly.) The safest option is a drogue parachute - the small stabilization parachute you see when watching tandem skydiving videos. They kept a drogue as an automatic backup to attempt to stabilize him if he encountered an uncontrollable spin. But even that has its risks. An entanglement on a jump like this (or any jump, really) could be a death warrant.