6. I like the idea of a breathing tube. The underwater shoulder > stand has a certain romantic ring to it. including an attempt at a submerged shoulder stand. Hey, new > idea... maybe a 5 foot piece of tubing for breathing... hahahaha. You guys have seen too many movies ... water pressure, even from very low depths, pushes down so hard on our ribcage and midriff that breathing becomes hard to impossible (never actually measured it but I'd guess 2 ft when horizontal ?). Divers inhale compressed air through their air regulator to regain the breathing balance, basically their lungs are inflated once under water. Keep dreaming, you might hit the jackpot Cousteau never thought about - or at least sell the idea to Hollywood !