It took about 4 versions, but I have a playable version of a map similar to this concept (full concept by niliq, except the cars). Drop by the channel if you want to play it. I want to organize a bigger game of it (8v8 or so).
Here's the layout now. I'll post pics when I get the chance. The map is bisected by an inpenatrable glass wall. Each side has an assortment of throwables and explodeables. As soon as I figure out how, I'll write in respawn for exploding objects. At the top of the map (2400 units! That's really tall) are a bunch of floating cars. I dare you to try and move them
. On each side over the wall is a box that a rocket launcher spawns in. You can stack cars/items to make a bridge to the box, or you could play basketball with the hand grenades and blow the RPG out of the hole (hopefully on to your side). Grenades spawn on the floor in abundance, and each side is color coded red and blue. Works pretty well with teamplay ( I think, I need a large player PT ). We used Hopelessness' server, which was good when nobody was downloading (and terrible when they were). If you played this map and have feedback, post it here!