Actually I did have something similar to this happen to me when I was about 12. I was in gym class (where all the fights happen) and there is one girl who for some reason never liked me, I don't know why but she really wanted to kick my ass. She out weighed me by about 20 pounds but I was sure I could take her.
At the time i was very chivalrous and felt a man should not hit a woman no matter what. so I just avoided her.
here's the funny part: One day she was talking trash to me and I was giving it back to her. Well she starts chasing me and I avoid her easily. Now I had this friend in my class with ONLY ONE LEG, he had a false leg but still used crutches. SHE GRABS ONE HIS CRUTCHES and comes after me swinging!!! IT was the funniest thing, her grabbing a one-legged man's crutch, anyway i was having a hard time staying out of her reach with the cane, and if I was caught fighting I would get suspended, so I ended up throwing a handful of sand in her eyes, got her real good too.