That is what I don't understand. He had her on the ground. Any reason he couldn't just keep her pinned until the others arrived? He essentially let her get up which gave him a justified shot. But it seems like that part could have been avoided just by staying on top of her. Admittedly, it doesn't look like he is in very good shape.Nothing wrong with this shoot.
I will say though, the camera makes it very difficult to understand why he felt the need to get off of her. There is nothing inherently WRONG with it, but it appeared he could have just sat on her back.
Sort of like the mentality when people jump out of moving cars. Their body may act without the brain actually thinking.
That said...if I saw someone pulling out a knife while I'm wrestling with them, I'm going to get the fuck away immediately.
Mental Illness. Mental Illness. When the fuck are we going to stop ignoring it.