Barcelona head coach Ernesto Valverde opted to drop Messi to the bench in their La Liga game against Sevilla at the weekend, protecting him ahead of their Champions League clash with Roma on Wednesday.
However, he was forced to bring him on late in the game as 'Los Cules' trailled the home side by two goals with their imperious unbeaten run under severe threat.
While warming up, Messi watched Muriel score to make it 2-0 to Sevilla, who then decided to celebrate right in front of the Barcelona talisman.
In hindsight, it was a rather foolish decision given that Messi then joined the game and became the master of the Catalan giants' revivial which saw them leave Seville with a miraculous 2-2 draw.
Muriel and his teammates learned the hard way that you should never celebrate in front of the Argentine magician unless the full-time whistle has blown...