Dave Matthews Band bus incident
On August 8, 2004, a tour bus belonging to the American rock group Dave Matthews Band dumped an estimated 800 pounds (360 kg) of human waste from the bus' blackwater tank through the Kinzie Street Bridge in Chicago onto an open-top passenger sightseeing boat sailing in the Chicago River below. The incident has been referred to as "Poopgate" in retrospective assessments.
Source: Wikipedia — Dave Matthews Band bus incident (CC BY-SA 4.0)