I have to go see this someday! I would love to try out some of the obstacles that are on the show.

http://www.musclepark.jp/park_en/index.html

This seemed appropriate, in context. Looks like fun:

http://www.jpn-miyabi.com/Vol.37/ninjya.html
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"In case you ever wondered what it's like to be knocked out, it's like waking up from a nightmare only to discover it wasn't a dream." -Forrest Griffin