Aside from climbing out of rattlesnake-infested quicksand or posing for rattlesnake-infested watercolour portraits, few activities combine the focus and physicality seen in jiu-jitsu training. Engage in training of a safer nature with today's Groupon: for $20, you get a six-class pass to Michael Foley's Academy of Martial Arts (a $52.50 value).

At Michael Foley's Academy, talented instructors train practitioners aged 5 and older in Gracie jiu-jitsu, kenpo karate, kickboxing, and wrestling. A friendly atmosphere ensures students of all levels feel welcome to bristle their inner porcupine via a variety of self-defense and competition tactics. Both men and women partake in a sweat-inducing, skeleton-putty sculpting schedule of classes offered at least five days a week, morning through evening. Protective gear is provided for the kickboxing class but must be purchased after a month of use for the kenpo karate and jiu-jitsu classes. To learn more about the academy, visit the FAQ page here.