In this TED talk, David Kwong talks about the intersection between crosswords and illusions. The trick he pulls off at the end is rather neat, and the build up seems obvious once you know it, but first time watching, it’s very good.
I love watching these mind trick illusions, and always try to see whether I would get the trick before the time is up or not. In this case, I didn’t, but it’s still fun to guess.
What did you think of it? Onwards!