It's a map for practicing movement with instagib CTF in mind. Author was Kast, a member of the instagib clan immortalGaming. I reuploaded the map here: http://files.filefront.com/igstrafev.../fileinfo.html
Instagib community's fairly dead these days. More's the pity, definitely some of the best fun I've had.
Oh, keep in mind that instagib is played with g_speed 415 rather than the default 250.