"Okay, get this: we get a trash can, one of those big plastic ones, and we cut a hole in the bottom. Then we attach those pool floats to it and put it upside down in the pool. We get, like, five or six people to push it down and then the pool floats will bring it back up. Then everyone swims up in it and takes a breath!"
--A guy at a party describing his fool-proof plan for the largest ever gravity bong.