We used to have this guest at Wendy's called "Code Brown"
The Code Brown lady always made a mess in the stalls, leaving shit on the toilet seat, floor, etc.
The one day, she had a massive shit stain on her, that the stall was covered in shit, the walls, her pants, and it was going down her back of the leg, leaving trails behind. It was so bad, she sat down, and left with a pile of shit on the bench.
This is what trainees are for. To clean up the shit.