TBT = You are giving me a bad flashback!
From Wiki:
In 1978 after the film had returned to CBS, a computer malfunction at the CBS owned-and-operated WBBM-TV in Chicago accidentally cut off most of the ending to that year's Oz telecast, interrupting the final minute with a commercial block that was not supposed to air until after the movie had ended. Because the break was only 42 seconds long, no attempt was made to override the computer, for fear of making the problem worse. For several hours thereafter, WBBM received angry calls from viewers, while those unable to get through chose to voice their displeasure wrote to the Chicago Tribune and Chicago Sun-Times newspapers.