Assuming the poop fingers, but there was some dump action that took place in the stall and the guy proceeded to leave the bathroom with zero hand washing..
I once has a boss- an old school type of guy, who took a whizz and then turned around started to walk out and patted me on the back with the hand that he used to.. well, you know..
Never looked at him the same way.. PTSD.. Post toilet stress disorder..