On a recent dive trip to the Corondo Islands near San Diego, CA I dove a spot that was home to a large family of seals. On the dive the seals were being playful and swimming all around me. It was a great dive and everything was great except when I sat in an upright position to view the seals, my exhaust bubbles from my regulator would go in front of my mask a block my view. It seems all current design regulators are designed such that the air exhaust air bubbles only take a none visual evasive path when one is swimming along looking down towards the bottom. So here's my idea. Why not make a regulator that exits spent air either through the first stage or to the rear of your head? If this already exists, I have never seen one. Thoughts anyone?