we did a back-painted shower where everything in this shower was chromium green. and -- yeah. >> nice. >> and including the floors. and so it's all back-painted glass. so you don't want to -- i mean, gosh, i could slip -- you could slide on a thing like that. and so it's this non--slip glass. >> i wanted to know what kind of glass is made of -- in tanks, where you can shoot through. >> the answer is it's a laminated glass. they're using a -- but instead of laminating it with a polyvinyl beautate, they're using their own product, which is a different kind of acrylic that they've got proprietary rights on, that is more gummy, it's something that they have formed there. but it's essentially like a sheet plastic, but of a different configuration, and extra clear, that they laminate between pieces of tempered glasses. those pieces in the tanks are about that thick. and they are slanted so that they can't see glare. and what we have to do in a tank, or -- on the inside, where you are shooting from, is you have to put a laminated piece of glass or plastic to the inside.