Barcelona recovered from 2-0 down to beat Getafe 5-2 in La Liga on Sunday, and winger Cristian Tello was keen to capture the moment in a photograph.
He sought out Pedro Rodriguez, whose hat-trick helped turn the tables, and the pair stood together for a picture on his Instagram.
But what he obviously hadn't spotted was the mystery Barcelona player with his bottom out in the background...
The Metro adds in their story:
The identity of the team member in question is so far unknown, but defender Gerard Pique spotted the gaffe and suggested fitness coach Aureli Altimira, Cameroonian midfielder Alex Song, 22-year-old Marc Bartra or veteran trainer Pepe Costa as four candidates.
So there you have it. The photobomb has evolved and is now henceforth to be known as the "photobum."