I'm hoping there's somebody here who can suggest what it might be from my terrible description

So basically it was a long map with a tower at either end, and the flags were behind the towers. Approaching the tower you had trampoline pads up to each side of the platform around the tower base. From the top of the towers you could snipe across to the other tower. Along the sides of the map there were also some trampolines. If you fell off, you fell into nothingness (space?) and died.
It's a pretty vague description as it's a good few years ago now. Anyway if anybody has any pointers (or even better a screenshot) of what it could be, please reply.
The only other possible hint I have to go off (from an old email) was that we referred to ump1.zip but I'm not sure if that actually contained the map or not.
Thanks guys!