On February 9, 1989, Billy Tubbs's Sooners were off to a bad start against Missouri. With OU down 23-8 early, the Sooners went into their usual full-court press defense but were called for a foul. The crowd began throwing objects onto the court. The PA announcer announced that any further debris would result in a technical foul on OU, but Coach Tubbs then took the microphone himself to make it perfectly clear.
https://www.youtube.com/watch?v=sM6dwb3zIIo
https://www.youtube.com/watch?v=sM6dwb3zIIo