It was certainly a dumb thing to do.
I think sometimes we do things in the heat of the moment but to have the nerve to smack a stranger (a woman) in the but does technically mean sexual assault.
Now does this mean he will go to jail for this?
I think it was quite an ignorant thing to do and he crossed a line. It also makes you wonder what else he may have done that hasn't been captured on camera.
Based on his actions alone, I think 30 days in jail seems reasonable. Harsh but reasonable. The only way I would consider no jail for him would be some kind of lengthy community service and course in public conduct or something of the like.
He's already going to suffer from the internet. 30 days is my sentence for him, maybe he could serve it on weekends? Or not, it was a serious offence in that he thought nothing of doing what he did.
He is an a-hole but he didn't stab her or murder anyone (that we know of)