I don't know if the wrestler has to be determined by the referee to be unable to continue or if the wrestler him or herself can subjectively determine that they are unable to continue. I have seen this occur for many years where an illegal move occurs and the "victim" of the illegal move is not able to continue as a result thereof. I don't think the fact that the young girl may have been able to function hours or minutes later is evidence that should be held against her. If the kid I'm coaching is injured by an illegal move and I determine the kid is going to have substantial difficulty finishing the match due to the consequences of the move, I would take the same course as the Manhattan kid. I don't think the consequences need to be paralysis or broken bones. If the kid is shaken up significantly by an illegal throw, or their neck is sprained by an illegal full nelson, I don't think it is fair to make my kid continue wrestling at a disadvantage. The person performing the illegal move must face the consequences, however unfortunate. We had a kid when I was in high school perform an illegal slam on a kid who was unable to continue and it ended up being our kid's only loss in 2 years during a 2-time state champion run. He finished third in the tournament, put his shoes back on the next week, and won the state title. Probably a good lesson for your kid and an opportunity to confront adversity that will be present in every aspect of life, fair or unfair.