Erik’s roommate, Durand, got a cat.  

Durand doted on Milagro, constantly asking his roommates to check on him while he was out - feed him, let him outside, pet him, “make sure he’s ok.”

The roommates eventually got annoyed by the coddling and requests for special cat treatment.  Erik started sneaking into Durand’s room and scooping the cat dumps out of the litter box and throwing them away.  This went on for a week or so. 

Durand, worried that Milagro had stopped pooping, took him to the vet, who said that the cat seemed fine.  Durand kept worrying.

The next day, Erik went into Durand’s room and took an enormous sh*t in Milagro’s litter box.

Durand came home and discovered the monster poop.