My wife noticed this thread and announced to the kids that I was putting in a see-thru, submerged den at the pond, with a stereo, a recliner, a microwave, and a fridge. Her advice was to be sure and 1) put the hinge pins on the inside of the trap door, and 2) have something to remove them with, otherwise after I went down in she was putting a hasp and a padlock on it and declaring me missing to the cops.
My son thought the idea sounded rather Bond Supervillian-ish.
