anger:highly dilated pupils:extreme muscle twitching

i'm trying to find information of symptoms. i have always had anger issues, dealt with and still learning to controll it. i don't drink alcohol, i don't drink coffee, i don't do drugs of any kind even including non prescription ie tylenol. i have seen doctors when i was a child including a couple therapists who have said i had rage i was born with. i have never been diagnosed with being bipolar. i am generally a mild mannered person. i typically look at life logically. i do however sometimes have a short anger fuse with certain life issues, ie stupid people who act irrationally or people who intentionally push my buttons intentionally. now...there is one instance that has stuck in my mind for a couple years now and has worried me since and i use that situation to help controll my mood today. a couple years ago i had a coworker pick an arguement with me. i tried to warn him to leave me alone...to no avail. after a bit of time i asked him if he was going to back off and he said no...the situation quickly got out of hand. we were standing about 5 feet from each other , and i sensed quiet around me, i couldnt hear anything, my eye sight sharpened, my body started to feel warm, my body buscles started to twitch slightly, and i felt a little happy. i seen my coworker looking around as if looking for something to fight me with. as i was about to move, i was grabbed by a few coworkers and pinned while the other coworker was escorted away. after the situation, another coworker who witnessed the situation, said my pupils got so large that my eyes seemed black and evil. at the time, i was so enraged, i felt happy because i wanted to hurt the guy so badly which confuses me. all the while my mind was telling me that my family depended on me and not to be stupid. after the whole incident....minutes passed, as anger subsided, my leg muscles started twitching so bad i was almost stomping....i couldn't stop it for almost 10 minutes. now that you have read this...1.what caused the pupils to dilate that much?. 2. why did my body and mainly my legs twitch to that extreme?. 3. why did i feel happy when i wanted to cause so much damage?4. in a situation of that much anger/rage...how bad could the situation have gotten if the other coworkers didn't grab me?.....answers can be sent to [email protected] if i don't see them here.....