This can be taken to the extreme. Once at Carleton U. an entire floor received a “leaner” as we call it. There are three elevators, and late at night another held all three elevators, placed trash cans filled with water and leaning outward in each. Then they pressed 4 and slipped out. The result: a big mess on the 4th floor. Unfortunately the water also went pouring down the elevators and caused some damage. Housing was not amused.