This beachside picture has been wrecking people’s heads

There's nothing worse than something that you just can't get.

Whether it's a brain teaser or an optical illusion, we hate having ourselves tested to the limits. Optical illusions call into question how much we can really trust our eyes to tell you the truth. Do they show us what is really there? Puzzle over one long enough and you'll end up questioning the very fundaments of your reality. One picture that's going viral is a snap of six girls on holiday, apparently being photobombed by a stranger behind them. The hilarious photo shows the man taking the piss out of the ladies, lining up for a cheesy holiday snap but one particular detail about the picture is making the internet scratch its head. Comments on the Instagram picture ranged from "Oh my fucking God I can't breathe. Jesus Christ I almost fell," while another confused person admitted"It took me nine hours to figure it out." Can't see why people are giggling at the photo? Give up already? We'll tell you... Just to be nice. If you look closely at all the women's faces, you can see that the man's face has been photoshopped onto all of the women's bodies. Did you spot it?