I was on that jump. Here's a few things about large formation head down skydives:
1. Very high speed - this isn't like flying head down on a two way next to some jackass flying head up. Speed is your friend, especially on big ways. Simon's head up flying was topped out to keep up and he was running into people. That's not safe.
2. Stick to the plan - His flying was unsafe because he was head-up on a head down skydive. If you think that's not unsafe, you're not ready to fly big way skydives. If you happen to cork and hit people, people can get hurt or killed. If you think head up speeds are the same as head down speeds, you're an idiot. Simon was exhibiting almost no control trying to keep up with everyone else. He was not in his slot and busy trying to dock. And the chance of corking topped out head up is way higher than head down when you're busy trying to dock while running into people.
3. Simon's abilities are not impressive - I watched him bounce off the formation like a moronic retard on his feet. It seemed perfectly dangerous to me.
What Simon chose to do was throw a record attempt at the risk of the lives of the other skydivers on the jump. It was a callous and heartless thing to do, and I'm shocked there's skydivers with as much blatant disregard for other's safety. If you think that his abilities mean he's perfectly safe, by all means go make a 2-way mixed record with him in Wyoming or something.