Originally Posted by Rohirrim
That's why I've only gone on one night dive in my life.
Our dive guide told me a story in the Cayman islands. He was on a night dive going down the wall and something hit him in the back hard enough to knock off his mask turn him upside down and scare the hell out of him. When he finally got his mask back on there was nothing there. He never figured out what it was.
Also the iris roof opening is bad ass.