Well, I'm not old enough to have a job, but I do know something that happened to my cousin.
She used to work in retail at Proffitts, and there was this lady who used to go into the dressing room and POOP in the floor! Her excuse was she had some sort of IBS (irrital bowel syndrome) but my mom (a nurse) said she would have had runny poop, and my cousin said it wasn't runny it was solid.
Just EW!