I dare say (with out looking at that link yet, I just opened it though) he was over stimulated today. They had a mud filled day at school which he enjoyed at the time but now says it was good but he didn't like it?!
So an OT (Occupational therapist?) does what exactly? I kinda assumed that they were more for speech/(physical)developmental delays?

ETA - I realise sending him to his room isn't the best way to deal with it. But I just don't know what else to do. He is really nasty to the other kids when he gets like that & its usually Glenn in the firing line (which is kinda weird because normally he seeks Glenn out, as he likes to be in control & knows Glenn will follow him like a puppy). But Poor Glenn, he cries & gets really upset by Evan treating him that way. Glenn is very emotional & so so easily offended. So my natural reaction is to protect Glenn from being hurt. So Evan gets sent to his room.
We actually use to have those boys sharing a room. But it got so bad with them together we had to separate them. They play, be silly get worked up TOGETHER. Lots of giggles & good fun then in true Dr Jekyll & Mr Hyde fashion out comes Mr Hyde & Evan would go ape **** at Glenn. Glenn of course would have no idea whats just happened & gets upset/offended. So yeah we had to put them in different rooms at bed time. Now Glenn & Isla share & just recently Iain has joined Evan. Fingers crossed though that we don't get the same issues forming between Evan & Iain.

ETA- hmmmm Well Evan ticks a lot in the first one, The Tactile one. Is it normal to say yes to a bit of everything in all 3 sections of that though?
Glenn on the other hand, is the second one, the Vestibular one. Again, not strongly but a bit of everything in each bit.

Also, I was meaning to ask... Is it a normal thing for an ASD child to have trouble putting on socks? It drives me nuts that BOTH boys even at the ages of 8 & half & 6 & Half can not put on their socks still. Evan can get it if they are loose enough or the ankle type socks, but doesn't actually like the "little" socks. But Glenn boy oh boy, no matter how many times you show him, explain to him, help guide him through it. He just can't do it! Surly most kids have learnt how to put on a pair of socks by 6?