Arm Wrestle
This one isn’t really much of a comeback but more of a reward. One 11-year-old boy made a deal with his teacher that he would get to arm wrestle his teacher if he finished all of his work. The funniest thing is that he won!
“I once promised a kid that I would arm wrestle him if he finished whatever it was he was working on. He happily worked on it for half an hour, then came to claim his prize. Sometimes the littlest things work. Ps, he won. He was 11.”