Hallmac once bubbled...
I put on a 7mm wet suit, slide into my drysuit and duct tape all the seals good and tight. I hot wire my scooter and put in six 24 volt truck batterys. grabb a bunch of weight and my lift bag and jump into water with the scuba gear. At the bottom I lay the gear down, Tie off the lift bag and inflate it fully. Fully inflate my dry suit Trigger the scooter and cut the line Exhaling all the way.
Yep I bet that will do it. Thanks guys!
PS Hey Cave Diver This kind of gives new meaning to your signature line HUH?
Hallmac
LOL, not exactly what I had in mind, but if it works, it works!