I have this old comic stuck in my head from SMBC that I just can't find now. It went like this:A guy is at a party and has an impulse-thought about how crazy it would be if he just punched someone in the face for no reason. Then decides that for once in his life he's going to follow his crazy impulse, punches a lady in the face, then the whole party is upset at him. Then decides he's too deep into it to go back, so wordlessly he just gets naked in the middle of the room.
I didn't find the right solution from the internet.
https://www.smbc-comics.com/smbcforum/v ... f=1&t=4421
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On the forum you posted on, someone suggested this. And it mathes perfectly.
There's also an XKCD where a guy punches someone in the face, because it's really random and nobody would expect it. Could that be it?