http://img.photobucket.com/albums/v81/p ... se_map.jpg
its basically a U shape, so not completely unpredictable. windows on the sides can be traversed through with a jump crouch though.
the explosive barrels are present only in the hl2dm version, since its kinda fun to shoot explosive barrels around with the gravity gun. i really don't take myself serious enough as a mapper to never divert from a theme, i like putting wacky things here and there.