This optical illusion has left people on the web scratching their heads as they are struggling to figure out what's going on in the 'crazy' image. The puzzling photo was first shared by on Instagram - where social media users flooded the comments section desperately trying to decipher the 'confusing' snap. People couldn't get over the staggering amount of time it took their brains to see what was going on in the image, which features a dog wearing a harness.
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