So today I strangled someone, and according to them, 'almost' killed them?

There's this kid who's always making fun of me at school, he's always mocking my voice for being deep for a girl's, he makes fun of me for other stuff too, like the time when I wore a Naruto headband to school (sand village to be specific), and he started calling me Gaara, because apparently I'm like Gaara and I sound like him,

But I had phys ed with him today.

We were waiting for the teacher and the others to come along, he started annoying me, he was sitting on this rail.

So I grabbed him by the throat, choked him for a few seconds, then I pushed him backwards over the rail, he squealed and then said "YOU COULD'VE KILLED ME!"

I laughed hysterically until my stomach hurt for a good 10 minutes.

I haven't gotten such a big rush in years, it was probably one of the best moments I've had in years, it was even better then the time I won a Judas Priest CD.

It was even stranger because I usually don't feel anything ever, I'm usually just miserable, or like some sort of robot (hehehe Metal God).

Why exactly did it feel so wonderful putting someone so pathetic through pain?