Nothing beats the portapotties at Reagan Airport for nastiness. Philly Greyhound station is the Taj Mahal in comparison.
Someone dropped a deuce in the urinal. You'd have to be a goddamn acrobat to do it but some ant did.
And why? It's a one person unit so it couldn't have been because they were browncapping and the stall was occupied.
It's an unsolved mystery of life.