Diver one of sixteen to die using high-tech gear

[DRE]

"If Nicholas was breathing from the unit when he went unconscious and he was found on his back by his buddys. At that point the mouthpiece would have been open, all the gas would have escaped and the breathing loop would have been flooded. With the loop flooded the Sodasorb would have turned to a caustic coctail and all 3 02 sensors would be ruined."

So your telling me he took out the mouthpiece, closed the loop and started breathing water just for fun? Or did he maybe notice he was toxing and never made it in time to his bailout?