I lurked here for a while, so I kinda had reference points to begin searches.
When he gets to the next stall he quietly steps on the rim of the toilet and pears over the partition. And low and behold he finds the man seated on the toilet and what appears to be a naked from the waist down Tom Prince standing inside of the Brown Shopping bag. Tom was jerking off in front of the mans face.
Here's the link to the thread on the whole "brown paper bag" story.http://www.getbig.com/boards/index.php?topic=240954.0