Nicolas Sarkozy has been caught on film telling off a young man who wiped his hand on a friend's sweater after shaking the French president's hand.
Sarkozy said "Fais pas le malin, toi" three times - roughly translated as "don't get clever with me" - jabbing his finger at the young man.
The incident was caught on film by French TV channel TF1.
The French president was visibly mad at the perceived slight, possibly due to recent polls that show his approval rating is at the lowest it's ever been.
Sarkozy sermonne un jeune homme sélectionné dans Actu Etranger