If I'm not mistaken, they could find him criminally liable for punching her and causing her to lose consciousness. This, even if she consented. Usually when a bdsm "Expert," makes a statement, I roll my eyes. BDSM is so subjective and people can get overly opinionated on their version of it. But, this time, I agree with what the "Expert" said. There was a lot of irresponsibility go on. The woman did not deserve to get beat up like, under any circumstances. But, sadly, she did put herself in that situation. Hopefully, she has learned to be more careful. It could have been much worse.