i think iv seen this before and it was apparently because it was a fancy dress round but he had no costume so someone said it as a joke and he took it seriously!
The first thing I thought was, at least he's wearing a hat. The second thing I thought was - good jumping bareback! The third - f me, that's GOT to hurt!!!
I was watching where his lower leg stayed and how far and when he went up and forward for the jump; then wondered how that would compare to when he was dressed and with a saddle