Girls just want to have fun.

Tubing, also known as biscuiting, is where a large circular rubber tube is towed behind a boat at fast speeds. Generally considered a novice or child's water-sport due to the lack of skill involved. The general aim is to hold on as long as possible without falling off due to the boat's sharp turns; more experienced biscuiters also try to jump the boat's wake and become airborne. Also a very simple and novice trick for beginners would be the barrel roll, once the tube is on the outeredge of a corner going faster than normal, a rider can intentionally roll off the tube to try and roll from upright to upside down and back again all in the same motion.