My boss is verbally abusive to me in front of my team members, having threatened to punch or slap me on multiple occasions. He has done this at least twice now, in the space of a few months. It's happened when situations have turned out counter to what he'd like.
At first, I ignored it as a once off. However, it happened again shortly before I posted this, so I've decided to keep a log of these incidents. How many incidents do I have to log before it's appropriate to file a complaint against him? Is it acceptable to complain to his superior without first complaining to my boss about it?
For what it's worth, I'm not concerned about being unpopular with him; it's hard to have a good working relationship with someone who's hostile to me.
Note 2: My boss also happens to be the head of the equity committee where I work, despite making sexist and off-colour (no pun intended) jokes and comments.