My response to that is the same as the last time you brought that up a few posts ago.
So her first steps are to let him get away while she calls people (including people she doesn't even know) before preventing him from leaving with the girl. Either that or you are assuming that the universe runs on "Talking is a free action" unlike ours. And for the record, she didn't immeadiately resort to violence, she talked to him first.
Look at the next "god-damn" page, where he's clearly immediately able to talk and is unharmed. Stopping someone from breathing permanently is certainly causing serious harm (or more to the point, death), doing so for a few seconds is merely discomfort. I can actually remember taking torso blows that left me unable to breathe for a short time, and while I definitely did not like the experince, I can't categorize it as anything more than that.