WALL
Structure of astounding simplicity. In terms of building and
design, you can't get much simpler than a wall. Actually, no, I'm
wrong, a floor is simpler to build. Because you don't have to worry
about it falling over. Because it already has. Floors generally
have very little job satisfaction, because it entails letting
people walk all over them.
-- Daniel Bowen's TOXIC CUSTARPEDIA