WCCB-TV, Charlotte, NC, had a fake shutdown. The man who has been instructing us as to what to do for the past year or so had his last report as he flipped the switch and then there was nothing. Then the video came back and he said he was just kidding. Of course, since I was on cable at the time, it was obviously fake.
The station went off the air for real Sunday. Given that the same thing happened everywhere, it must have been a Time Warner problem. They were back not long after that.