Wildly out of control in pitch-blackness with only the downward slope of the tunnel and the gushing water giving you direction... then BAM! You are out of the tunnel spinning around and around in a large dark cavity. But wait! There is a small hole in the middle of the cavern with a shimmering blue glow. You try to prevent the fall, but the slippery slope and running water leave only one way out. It is inevitable. Headfirst with a clumsy attempt at a dive through the blue opening and SPLASH! 9 feet deep of startling cold water greets you.