i was never been bullied in my life until some months ago. actually, i wasn't bullied for being a loser (i was of the most well-known guys in my school and i had lots of friends), but because we were on a trip with a senior class (i was a junior) and i was the only one they knew (some of them played basketball with me, some other soccer and some other were just people i had met at school formerly). my classmates wanted to sit in the back of the bus and i managed to take all the seats for them. then, at the half of the trip, the seniors asked me to exchange seats, because it wasn't right to let them stay near the teachers for all the trip long. actually, they were right, but i wanted to act cool and i refused. they got a bit angry, but got back to their seats. some hours later, they were making fun of everyone in the bus, while i was chatting with my classmates. they surrounded me and started singing a song to me and then giving heavy pats on my neck. i laughed it away, since it didn't hurt. so, they went on for all the trip, day after day. then, i realized it was really humiliating.
when the trip ended, 3 days after, i thought it was all over and i said 'well, who cares, i looked like a loser, but it's all over, nevermind'. i was wrong: a couple of days later, at school i noticed they were all around me, in front of the main gate and started singing. as soon as i felt a hand on my neck, i started reacting: one of these guys had his crotch kicked, another one had it grabbed, another one got smashed on the face and another was heavy hit in the throat.
they weren't hurt seriously, but they never tried to do it again. ok, i lost their friendship, but at least when we meet, they greet me with respect and would never do that again.
notice that these guys were all older, taller (they were all over 6', while i'm 5'9) and far heavier (i was skinny back then)...