I have encountered an autistic rage at my high school back in 2013, a shortcoming came to him and he was throwing desks around in a fit of rage. I had no idea why it happened nor do I know if he was punished for it but I know it was during lunch break. I've also came across many autistic people before, many who were severely autistic.
Often at the campsite our relatives come and visit, one of them is severely autistic, he can barely string a sentence but he's getting better but he'd often push button which sometimes gets him some stern looks from others. He'd also sometimes take stuff that don't belong to him. But to him, these simple rules he couldn't comprehend but easily acknowledges if he does something wrong and is told about it. I would sometimes supervise him when he comes into our trailer.
I may have mentioned this before but I've encountered some autistic raging in the subways in Japan in 2023. There was this one man raging at the security guard though I don't know what his problem is due to the language barrier. There was also another schizo on the subway train also in Japan, he wasn't even close to being coherent (pure gibberish) and often do absurd angry noises and it was pretty intimidating.
I've also been to a mental hospital in 2018 and spent almost a week there but the autistic raging I head that one night scared me and had me not move out of my bed for the entire night in fear of being beaten up. There was another autistic rage I encountered later in the day, he was flipping tables and everything. But what would you expect from a mental health unit?