This was at the BACA (Bikers Against Child Abuse) Charity ride in Orlando. The Orlando Harley drill team was putting on a demonstration.
Link to original page on YouTube.
Stuff happens. He was OK, other than what looked like a sprained wrist and a little rash. He bounced his head pretty hard on the tarmac, looks like he KO'd himself. Helmets save lives. In this case, I'm sure it saved him from a few other nasty wounds/injuries...
There were a couple of us there, I think Sombo got a much better angle than I did on this.