THIS optical illusion will leave you scratching your head trying to figure it out.
The clip appears to show a red box being held - but by the end of the clip, you'll be baffled as to how.
Created by Olivier and Chloe Redon, the 'Oh La La Box' is an optical illusion that won the 2021, and we can see why.
Watching the video, your eyes and brain can clearly see a bright red box.
But as the video continues it's revealed there is no box at all.
Watch the video above to see if you can figure out how it works before scrolling down and finding out how.
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The deceiving video of the box is actually an optical illusion that uses reverse perspective to play a trick on the eyes.
In fact, it's just two pieces of cardboard strategically placed on top of one another and folded.
But when the cardboard is shown from a distance, the cardboard appears to look like a 3D box due to the way our brains process images and spacial awareness.
The phenomenon is called: "reverse perspective," and is used in many optical illusions.
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The Neural Correlate Society, which holds the competition, researches how optical illusions play tricks on our brains.
In the description of the video, they explained the science behind the illusion: "The two pieces of the box (front and back) visually fuse together to create what appears to be a normal ordinary box.
"When both pieces (with inverted (also known as reverse) perspective) of the “Oh La La Box” are properly arranged and viewed from a precise location the box is completed."