I think the other 2 guys standing there were:
1. Waying the 57 reasons to not act.
2. Trying to figure out how to escape to call 911 to be a good witness.
3. And, exploring the legalities of defending the and stopping the punk.
4. Were waiting for a LEO to stop the crime.
5. Quickly decided, since they had not been hit, it wasn't their problem...
But legally, I think boxer's (some of them) hands are considered deadly weapons
I think boxer's (some of them) hands are considered deadly weapons plus he did just strike a minor.