This seems like an innocent image of a girl standing against a wall, but it's gone viral for a very rude reason.
If you look closely at the snap, which was doing the rounds on Imgur earlier this year, there's something that doesn't look quite right.
In an awkward trick of the light, the shadow around the woman's knees looks suspiciously like an exaggerated male body part.
Of course this isn't the only rude optical illusion floating around on Imgur, and this couple's holiday snap was raising eyebrows a few months ago.
At first glance it seems very x-rated, but look a little closer and you'll realise it's all a clever ploy.
Another camera trick that will make you double take it this one. The image below shows a girl kneeling on the ground, but something is very wrong with her legs.
And how about this doozy? It was uploaded with a "sorcery" trigger warning on Reddit with the caption, "My phone has a wide selfie feature similar to a panorama. You need to sit still for it to work. My girlfriend sneezed, and this happened."