I wasn't there. I still say that when 2 other passengers help RESTRAIN the perp instead of telling Penny to let him go, that says it all.Reports have him standing up and throwing his shirt down and screaming that he didn't care about going to prison. I haven't read anything to suggest he specifically threatened anyone but even if he did, while that might be a reason to arrest him it isn't a reason to violently choke him from behind. Your right to self defense must be proportional to the threat you face in order to be reasonable.