Nikos, what they've suggested makes perfect sense to me. If people try to explain what I've done wrong using long sentences and eye contact and hugs or whatever, it overloads me more than the situation I've just not coped with and makes it worse.
One stop/no command, space to think in, safe space and duvet to wrap myself in, and then I can calm down and think things through.
The trouble is, you probably can't see what we see, or hear what we hear, or feel what we feel, or smell what we smell, or taste things the way we taste them. There are triggers aplenty, and no way to explain them if we're already at the "arrghh - overload!!" stage. Even here, sat at my desk, there's a fluorescent light flickering and I'm feeling totally yuk because of it (engineer's been called out to fix it), and the lining on my new jacket feels like someone's sticking a pincushion into me, and the computer whirring is driving me to distraction.
It took me four decades to work out some things that were overloading me - that's how bad we are at connecting the outside world to our consciousness and our ability to speak about it. It's almost worth getting another ASD person into the environment where he's causing the problem to see if they can spot it and explain it. Local ASD charity might be able to help with that, though it'd be an unusual request (no-one's thought to do this stuff yet!)