I have a light form of autism, and i can lose my cool at times. But my true dark side came out last year in high school when some jerk said very derogatory terms at me (I won't go into details about what he said, since they are pretty bad, and i don't want to re-live that moment by typing in the words.)
Anyway, after he said that, i calmly got up and started to walk away. Then before he even had a chance to react i turned around and punched the bloody bugger as hard as i could in his face. He stumbled to a wall where i continued to punch him in the face and eyes. When he dropped to the ground i calmly turned to the people who watched me and said "If any of you make fun of my autism, you'll suffer just like him!" I then kicked him in the face one more time before i walked out.
I had to write a bloody letter of apology to him, course it was either that or get expelled. I never felt sorry for the guy. They gave me the option of writing the letter because even though I'm only LIGHTLY autistic, they think I'm on the same fucking level as the special needs department people you see in every school, which ticks me off even more.