Well, actually, there is a proper way to hit a woman... but usually one of the requirements is not having a witness, let alone any video that could be referred to in the future as "exhibit A", the L.A.P.D. is well versed in that protocol.

The back of the head is a bad place with or without video/witnesses, cause if you do it wrong you are left with the question of "where am i going to dump this?" and you are going to have to get your own beer, at least until a suitable replacement is dredged up at the local pool hall or on day shift at the strip club down the street that kind of resembles your trailer from the outside. The stomach is a much more suitable place to land your punches because A) its harder to bruise, and B) it helps prevent unwanted pregnancies.