Human tetris map!

So i had the idea of making a map like this tv show. http://www.youtube.com/watch?v=gZLaPF0BGY8
With different levels and triggers, which would make the walls come towards you and you have to jump to a hole in the wall before it pushes you into water, which would teleport you.

Good, bad? Do-able?

What would work was to just have some blocks or just other jumps where the players stand waiting for the wall. These jumps eventually leads to the hole in the wall. IF the climber doesn't reach the hole in time he/she will be pushed into the water. But for that the walls need to be huge and the map would be best for kzmod I think.

Cool idea :)