Monkey Bars of doom
This is one of the best and worst obstacles. What kid hasn’t attempted the monkey bars on the playground, and pretended that there was lava or a lake below?
In this obstacle you can sort of live that thrill, but with the risk of falling into a pond if you loose your grip. The first time I tried this, I barely made it two rungs before loosing my grip and falling into the cold water below. The second year I tried it, I nearly made it to the end.
Maybe next time?