Tig is right :). those maps are very similar to this :).

@SW12: Try - Zero Cube 74 by Munyul Verminard, overBounce by Dim_Walker, The Rail Pit by Nickliff and (maybe) HardCore by dTd

Any other maps like this?

You can lower the gravity in-game by bringing up the console and typing "g_gravity #" (800 is default gravity level)

interesting idea. Maybe lowing the gravitiy (so you do not fall as fast) would have helped a lot more.