If any of you ever played The Legend of Zelda: Majora's Mask this will be really easy to explain. otherwise, bear with me.

if you have played, just think of the one shop in east clock town where you pay to run through a maze that changes daily.

Imagine an indoor or outdoor field, with a grid on the ground. kind of like a chess/checker board. each line of the grid is a wall made out of some sort of material(sheet metal, polyester, glass?) that can be raised or lowered via a computer terminal on the sidelines. it would cost hundreds of thousands to make, but EVERY GAME could be different, even designed by the players...

Then, say the raising bunkers were made out of some sort of composite that wasn't see through, but had two glass/polyester strips in it, and they light up red 30 seconds before the bunker goes back down and another raises. it'd make the game much more interesting...

probably won't ever happen, but a man can dream eh? would you play on a field like that?