I was bullied a wee bit in elementary school, but as the class clown I was generally excluded from such bullying. Only one instance really comes to mind, in which two fellows from my class decided it would be amusing to mess with me.
Well, I was a scrawny little doofus who's only weapon or ability was humor, so needless to say I couldn't fight back. However, being the character that I was, I had made a lot of friends. A few such people saw this happening, and before those two knew what had hit them, they had literally half of the school (and it was a very large school) saying that if they messed with me again, it would not be pretty. Needless to say, they stopped.
In middle school, I became rather fed up with one of those same people and went at him in the middle of class. He had long since stopped "bullying", but he was a highly irritating human being. After we kicked each others butts and were suspended, we sat around and had a good laugh about it. All of that pent up frustration between us was gone, in its place was now a respect of sorts.
Anywho, in my first year of middle school (prior to the aforementioned instance in class), being that the untouchable status was no longer present (new school, new rules), I came face to face with a new bully. One who targeted me directly. Each and every day, sometimes multiple times a day, he'd come up and punch me in the stomach. And this was not a light punch, it was a full-blown knock you to the ground sort of hit.
After some time of this, my stomach became hardened in response to such punches. They no longer had any effect on me. Now, getting hit until you form a natural defense against it wasn't the best way to end a bullying problem, but at the time I hadn't even really considered that I was being bullied.
Then, not long after that, I beat that same bully, who was quite strong, in a series of arm wrestling competitions. From there on out we formed a friendship or sorts, based on mutual strength. And that was the last time I ever encountered bullying towards me.
I was now king of the hill, head of the pack. Unfortunately, this came with its own drawbacks. Being young, popular, and quite apt at verbalizing my thoughts, I became a bit of a bully myself. I was only ever a verbal bully, but it's a period of my life I regret deeply nonetheless. A few years later I would grow out of that phase and try and stand up for the little guys whenever possible. And that, ladies and gents, is my experience both being bullied, and a bit of a bully myself.