Alright, there was a a kid in the next door classroom named Austin (Same as my name) And we is VERY autistic. There was a incident which got him out of the classroom for good.
It was math, and we were doing fine and then we all hear him screaming and the other class comes bolting into our classroom. I then look inside the classroom and there is Austin, smashing a chair down on his helper, who is knocked out.
Soon there was the police and shit, but we never saw Austin again.
Pretty scary what autistic kids do.
One of the kids in my grade became a drug dealer during high school. It came to a culmination where he was lighting people's cars on fire that crossed him, and taking chain saws to cut holes into the walls of people's houses to steal their TV's and other valuables.
He was not autistic, or special ed at all. In-fact he was a rather intelligent fellow.
Anyone could do something equally as scary as hitting someone with a chair. Look at perpetrators of war crimes, none of them are autistic, and yet they murder hundreds of thousands of people. Often in some of the most horrible ways imaginable.
The only reason you find it scary is they are not as easy to predict as most people, as their brain processes information in different ways. So it seems kind of "alien" on how they are behaving.
Sounds like to me that his teacher was ill equipped/ill-informed on how to handle him, and sent him into a panic. I'm almost positive that he was probably more scared at what was going on than any of you were.