MOH? Never seen that acronym before(at least not in this context, none of the ones I've seen fit), and can't find it listed... specific brand of reg/second stage?While I think the mask on head thing has some validity...I once exited, hauled my butt 50 yards across the beach to the parking area, and flopped on a bench to catch my breath...with my MOH. Someone passing by pointed it out and asked if I was in trouble......sigh.