Well, then

A box, an isotope and a laundry hamper go water skiing. The driver of the boat with the engine that pulls them along had already drunk six servings of Jack Daniels and was in no condition to clearly monitors the water skiers he was dragging behind him. Fortunately, the box disintregated shortly, the isotope was not visibile and the landry hamper bounced around involuntarily but safely, so the driver didn't have anything to worry about until he crashed his boat into the pier at high speed.