I wouldn't want to keep anything under my bed. In any kind of earthquake/tornado/etc. disaster, whatever was under there would be all crushed and wet from the tons of water above it. Yeah - I still have a waterbed! Sometimes tha cat crawls into a small tunnel under there to sleep. That's OK. I'm not much of a cat person, and if the cat gets flushed and has to "ride the rapids" to escape after a waterbed rupture, no problemo.