A girl named Bree Tweeted an image of a pair of bare legs that at a glance seem to be incredibly shiny, as if they were covered in cling wrap or something similar. But once the truth is revealed, you wont be able to unsee the reality. And the internet has clearly been baffled at the discovery, because the image has since been retweeted over 5,000 times. Can you figure out what’s going on here?

It turns out that the optical illusion, like most, was far simpler than most people gave it credit. In fact, what you are actually seeing is caused by well-placed streaks of white paint, which makes the legs appear as if they are covered with oil or clingfilm. Boom. Did you get it? More importantly if you didn’t get it, don’t you feel really dumb right now? I sure do. Now go tell your friends and see if they can figure it out.

The internet’s reaction to the simple reveal.