A viral optical illusion has social media users baffled as a girl appears to be half-buried in a concrete path. Reddit users debated the explanation, coming up with a number of theories The picture left Reddit users baffled (stock image) (Image: Getty Images)

A mind-bending optical illusion that seems to show a girl partially submerged in a concrete path has left social media users completely stumped . The photograph shared on Reddit has had viewers puzzling over what exactly they're seeing .

The picture appears to show a young girl holding a mobile phone in a blue case, along with a concrete path, with grass visible in the foreground and a hedge plus trees forming the backdrop. The most perplexing element of the photograph is that the girl, dressed in a pink top, seems to

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