In the second round of El Clasico in 16/17, Barca beat Madrid 3-2 at Bernabeu. Messi scored a last-gasp winner in the 92nd minute of the game. Messi celebrated by running to the corner, taking off his jersey and showing the fans his name on the back with his confident, yet angry look.
This is an iconic celebration that has gone down into the history of El Clasico.
This dramatic late winner in El Clasico is Messi's 500th goal for Barcelona in all competitions.
In that season, Messi was the top scorer of La Liga with 37 goals, 8 more than second-placed Benzema. Real Madrid claimed the league title with 93 points, 3 clear of Barcelona.