The thing about April Fools Jokes, if someone tells me large
   computer display has been built using mice to splash paint
   behind a glass screen covered in chicken wire [to separate the
   pixels], I'd believe it. Because, yeah, it could happen. PS -
   it's pairs of Mice.* One to splash the paint, the other has a
   tiny squeeze to clean the glass before the next refresh.** When
   someone scrolls through a webpage, it's a beautifully
   synchonized event.