A high risk, high reward winter sport played in the rural American Northeast. A rope is affixed to the back grab bar of a 4-wheel all terrain vehicle, with the other end of the rope attached to a water skiing handle. A rider then gets onto a standard inner tube, holds on to the ski handle, and is towed by the ATV at a high rate of speed.
While enormously
entertaining, there has never been a "round" of quadertubing that has not ended in disaster, for either the driver, the rider, or both parties. Common injuries include joint dislocation, bruised ribs, broken bones, concussion, explosive bowels, and nosebleeds, but
surprisingly not death.
Quadertubing is not
recommended. Like, generally. There is no qualifying circumstance under which it becomes recommended. You'll probably do it anyway though.
No jumps. Seriously. Don't do jumps.