I was much smaller than the other kids, but because of that I could quickly grab onto the legs so that they would freak out.
The annoying thing was when they just started throwing rocks or food, and other crap at you from afar. Always in groups...cowards.
I think bullies just like to pick on kids that are different from them. My sister (ENFP) especially was picked on for the color of her skin. Girl bullies, I think, are more vicious, scratching and biting and that sort of thing.
I had an aquantance who had salt poured in his hair, I guess, for being a Math nerd.
Some kids became the butt of the jokes for everyone in school, due so amount of general weirdness. I always felt sorry for those kids.
Here again, I think girl bulies were more cruel, especially in high-school; they would fake interest in nerdy guys and laugh at them behind their backs. Or do some weird form of black-listing of particular girls that seem to hurt them quite badly, emotionally.
Then there were kids with huge backpacks or carried around stack of books and papers (I carried stacks, liked having stuff to read at the back of the classroom). People used to love smashing the stack down, and/or pulling down the kids with backpacks from behind (sent one to the emergency room).
Then, there was just general intimidation of younger kids. My middle school was next to the highschool, and we would pass by it on the walk home. They liked to flash knives and razor blades (I think that's what they were) just long enough to see the little kids run.