A schoolboy’s Halloween costume has left adults scratching their heads as a photo of his outfit went viral on social media.

The image shows the youngster dressed in a costume that makes it appear as if his body has been sliced in half, with the lower section standing separately from the top. Despite the impressive optical illusion, however, he only managed to secure third place in his school’s fancy dress contest.

Standing next to the winners, his costume was a baffling spectacle as his legs…