Wingsuits have been popular for a while now. Several years ago during a skydive I was on from 18,000', someone in a wingsuit, who got out after I did, got "big" just as he left the door. Instead of falling, he went up and back and hit the horizontal stabilizer on the Cessna Caravan. He crushed it, and hurt his leg. He didn't break any bones, but the airplane was out of commission, and he was on crutches for a time.
That's usually not an issue when making a skydive.