I was the other man that held him down and stayed until police showed up.  1) the woman chose not to press charges and she appeared to be "ok" as in, nothing appeared broken. 2) since she didn't press charges, i did.  What he did was completely vicious and i wish it would have been directed at me. 3) This was the third time in two weeks he had assaulted someone and one of many other times hea been detained in the past couple weeks the police officer told me.  I hate that we live in a place where this behavior gets a pass and a "im sure he's just having a bad day."  And Swift, I should have let you hit him once or twice more, but I didn't want you to get in trouble as well, i think the knee on his head did the trick ;-)