I did a Tough Mudder back in May of this year, which is a ~13 mile course with 25+ obstacles. Sadly, I can say there were hams aplenty, which made some obstacles very difficult because team work (amongst groups) was strongly encouraged. These fat fucks ended up would cause blockages in the otherwise steady stream of athletic participants. The only option was to offer help so they could get moving and free up the obstacle for real athletes. I saw a couple skipping obstacles as well.