Gathered for a sunny day out, this group of friends decided to seal their bond with a photo, not knowing the snapshot would soon turn into a humorous memory that they’d remember for a lifetime.

With everyone huddled in close, posing with wide smiles, the photo itself seems like an ordinary group picture at first glance. But if you let your eyes wander to the back, you’ll see a girl comfortably perched on a wall, her bare feet hanging down nonchalantly.

In the front, a boy stands with his legs slightly apart, completely unaware of the photo illusion about to take place. As the camera clicked, the girl’s dangling feet perfectly lined up with the boy’s legs, resulting in an optical trick that made it look as if the boy had something else hanging out of his shorts.

Once the picture was reviewed, it didn’t take long for laughter to erupt among the group, each of them struggling to stop chuckling over the harmless and funny incident. This photo, intended to be a sweet keepsake of their outing, turned out to be an epic snapshot that they would laugh over for years to come.