OMG - didn’t you realize that you probably caused this poor soul to suffer from years of PTSD? By your refusal to lay down and let him beat you, you have permanently damaged his self esteem.
He is probably now a lowly, homeless person with no sense of self worth. He is a lost soul amongst men.
The proper course of action would have been to go tell the teacher, so she could counsel him, so he could then have all his buddies join in, thereby ensuring the mental health of a whole gang of, I am sure, fine young men. /S
Given the choise of me not accepting the challange and my Old Man tanning my a$$, I would have fought them all.