Interesting day at the office

So I'm at work and right now one of my co-workers is trying to pull out my other co-workers hair. I think he is annoyed. She is just, um, maybe slightly immature? I mean I did that in 2nd grade. I'm not really sure what the point of it is because as far as I can tell nothing is wrong with his hair. They are both fairly new staff people and he is more new than she is so maybe it's some weird form of new staff initiation.