It's rude to get revenge on your ex roommate.
Jerry's old roommate, Justin, has just moved out after an acrimonious relationship with each other, with Justin leaving sand in Jerry's washer.
Jerry wants to respond to the sand in the washer.
Jerry refuses to give Justin the satisfaction of responding to Justin's prank, and simply cleans out the washer.
Jerry stalks Justin to his new place and slashes his tires.
Jerry moves on with his life and quickly forgets about his ex-roommate.
Justin calls the cops, and Jerry is arrested and fined.