J. Cousteau demonstrates his Mk.1 one-man submarine:
"I flood the tanks with water to dive, then to surface I exhaust it by blowing into the inlet valve."
"I can't see the valve - where is it?'
"Until we have the patent, the exact location of the valve is top-secret, but I can tell you that the whole concept is based on the Brussels Sprouts phenomenon... pardonnez-moi!"