Is it acceptable to punch someone violently?
I'm not asking if it would be legal, I'm asking if there's a circumstance that would make it moral, or even obligatory, civil law aside. Note that the qualifier of violently is added to ensure we are not speaking of merely jovial and fraternal punches, which are a trivial case to my mind.
Let's play "construct the example" here. I'm not trying to argue for a non-Catholic ethic, and "punching people is intrinsically immoral" is an option, but I'm going to want a defense of that.