umop 3p!sdn velcrobstacle couse

Take your standard military obstacle course, cover it in velcro loops and invert it to hang suspended above a lake or large pool.
Contestants run an upside down gauntlet with only their palms, knees, elbows, and soles of their feet covered in corrosponding velcro hooks.

Throw in some prize money, televise, sell advertising space and then send royalty checks to my offshore account in the Cayman islands.