Colour changing card trick

I have been meaning to link to this clip from YouTube for a while, and what with the recent references to Professor Wiseman and his blog, I thought it was now time...



Richard uploaded this short film to YouTube in April 2007. Since then clip has been viewed a staggering 2.9 million times (2,909,647 times at the time of writing to be precise)! In addition to it being a dramatic example of change blindness, the clip's remarkable success on YouTube also demonstrates how sometimes when you do something you can't always predict what will come from it. The last time Richard and I met, he told me that one consequence of him making this film and posting it on YouTube was that world-famous magic double-act Penn & Teller had seen it and it had inspired them to devise a whole new routine for their Las Vegas show!