If I ever get back into crazy good shape, I'd consider this.
Arctic Enema – Participants plunge into a dumpster filled with ice water, dunk underneath a plank that crosses the dumpster, and pull themselves out on other side.
Electroshock Therapy – Live wires hang over a field of mud which participants must traverse.
Funky Monkey – A set of incline and decline monkey bars over a pit of cold water. The bars are slicked with a mixture of butter and mud.
Everest – Participants run up a quarter pipe slicked with mud and grease.
Electric Eel – Participants slide on their bellies through mud, frigid water or, even worse, a layer of ice while electric shocks hang overhead.
Berlin Wall – An 8–12-foot (2.4–3.7 m) wall that participants scale.
Boa Constrictor – Participants pass though narrow pipes and mud.
Walk the Plank – 15+ ft (4.6 m) high jump, from on top of a platform, into water.
King of the Swingers – Participants use a pendulum to swing off a 12-foot platform and attempt to hit a bell before falling into a pit of water.
Cry Baby – Participants crawl through a tunnel filled with a tear-gas-like substance.
Dead Ringer – Participants use handheld rings to traverse a set of inclined and declined pegs.
Balls Out – Participants use hanging rope to cross an angled wall.