There has to be a number the hc is comfortable establishing as a maximum, and no matter how, why, or when that number has been reached, they move onto something else. The way I worked it was a skill, or connection completed to support before falling was worth 1 point, 2 points if it stayed on, and 3 points if they remained square while staying on. Score 3o points and move on, but let me know if you go beyond 20 attempts so I can focus on that one kid's problem.
The hard limit for singles was 30 reps no matter how bad a day they were having or how "over their head" they were with the skill, and for same-same series the number was 20. I think there were a few early season occasions where the kids could have gone to 50, geez maybe 70, but they had that rule, and reminded me whenever I asked for more.......
You know, there's plenty of time to get skills figured out and prepare for comps, and too little time if the kids are constantly compensating for chronic pain.
There are a few other benefits, but that would be a very, very long post.