When I get really fucking angry, genuinely fuming-tier, I've punched myself. Usually in the leg (I'm fat, so it's a decent target), or square in the stomach. Nowhere the bruises could show. I've taken up an unfortunate habit of biting myself sometimes as well, usually as an on-the-fly reaction. I get a game over because RNG fucked me and I missed a 93% chance to hit? There's usually a bite mark on the back of my hand. Haven't drawn blood yet, and they fade quick enough that nobody ever sees it, so I figure I'm still good.
Related question: If I describe all this to a licensed """professional""" could I get an autism diagnosis and, hopefully, autismbux in Burgerland? I'd like to exploit this if I can, even if I have to act it up a bit, thanks.