If you get the explosion at depth you can experience what it is like to have a depth charge go off on top of your head.
WOW!
So it has the potential to kill a whole group of divers?!?
Not just the operator?
I get nervous when everyone else on the boat is wearing split fins, but this helmet thing seems even more ridiculous than cutting your fins down the middle.
So does it seal around your neck or just completely flood and fail if tipped to far?