For April Fool's Day this year, ImprovEverywhere pretended they'd done a flashmob at a funeral, posting a staged video of the prank to YouTube. The Tribune's CW11 news-team presented the prank as fact that night on their evening newscast, so ImprovEverywhere put a little clip on YouTube of the CW11 broadcast of their gag — CW11 simply aired their own video with the words "YouTube" superimposed on it.

So, naturally, CW11 sent a copyright notice to YouTube saying that the video infringed their copyright.