I was, as a quite book worthy individual (not a nerd, too stupid for that) that was an army brat on top of it. Repeatable moving ensured I never had any real core of friends when I was younger, marking me as a outsider. I still have this title, but after meting someone who taught me to psychoanalyse situations I am glad I am a outsider and not one of those mime driven groupies.... So yeah, I was often considered a target for bullying. Most didn't bother cause I wouldn't react to their actions with more then a shrug but some persisted.
All that stopped after one incident:
There was this kid at a day care centre who picked on me mercilessly because I read books instead of... I don't know it was a damn day care centre, not like there was much to do there! In any case one day, after relentless teasing, I looked up from my book and said, well I can't remember as I was a kid back then. But it was a simple challenge, a official 'duel' via fists, 'anything goes' but first to yield loses and that is the end of it, no more bullying after that regardless of the outcome.
One punch was all it took to have him crying to mommy... well actually he went crying to his friends mommy, who it turned out ran the centre. My parents where proud of me though, even after being told never to come back, cause I stood up for myself. Still there is a reason it is often said bullies can't take a punch: They really can't. They are used to being the one doing the punching that they can't even get over the fact they have been hit back even in their own minds. Something in there snaps in most bullies and they begin to cry, probably because it hurts their tiny little brains to realise someone isn't scared of them.
Interestingly enough it was as if a switch was flicked on in my bio-chemistry as no one, not a single soul, bothered me from that day hence. It was as if they could smell the fact I wasn't just someone who could fight back, but someone who would do so without remorse for whatever actions I must take in doing so. Indeed I have been in several fights since then, none because of bullying though, and all the time I fell into a berserker rage. I probably would of killed someone if it wasn't for my bear of a brother pinning me down till it passed.