Image Credit:
This afterimage is based on one one of the most recent internet trends "rickrolling" in which a link to another web site or video directs instead of Rick Astley's 1987 "Never Gonna Give You Up" music video on Youtube. To see this image stare at the cross in the center for about 30 seconds and then look away at a blank surface - blinking repeatedly can help to make it easier to see.
Wow amazing