Two Towers Quarentine glitch

ok, im not sure if this was posted, doubt it, when you turn zombie in two towers....just go to the bottom of the water when you see your feet on the bottom, press S and go up, you will jump up high, just so you can get those people hiding on the crane or that medal thing.

pictures plz

its in this thread. http://www.mpgh.net/forum/184-combat...mp-glitch.html