I wonder if it was a mistake of the master control operator...or the switcher...splitting the audio/video. If you were seeing nakedness, I'd definitely say that was it. Some operators get bored with their programming and will watch other stuff on different banks of their switcher. We shouldn't, because that means it's only a second away from going on the air.

When I worked at a PBS affiliate, the operators there once were dubbing some porn one morning, and one guy had it on the preview bus on the switcher...and forgot when he went to roll a break after sesame street...and put a few seconds of that porn on the air. I think there were some surprised kids that day...