That'd be Gastroenterology
Block K, just down the corridor.
( spacehog see my photos at http://tinyurl.com/marks-snaps, Fri 5 Jan 2007, 11:19, archived)

Follow the trail of fecal matter.

( Professor Kenny Martin Receiver of the world's first Marbleositing, Fri 5 Jan 2007, 11:25, archived)