Richard Wiseman — The skull
This is a nice little video conjuring illusion by psychologist Dick Wiseman of “Quirkology” fame, that is neither edited nor makes use of any CGI effects. I’d recommend stopping the video just after the trick to try to figure out how he did it yourself, then restarting it for the reveal afterward to test your guess. You’ll be surprised how simple it turns out to be. Sheer brilliance, Prof. Wiseman, good show!