There was one week where a lot of people finished the course and won the prize. Then after that, the buzzer seemed to go off just before they were done, on the last obstacle or one before that. I don't know if the tv network didn't want to give away a lot of prizes, if the kids figured out how to beat it too soon, or what. Looked to me like they were trying to keep people from getting through so quickly after that. Maybe it's just me, but that looked kind of weird.