It has the feel of a weird fitness video as the team stand in formation to kick a ball on a string from side to side in precise time.
The drill, aimed at working on the youngsters first touch with both feet, saw the boys turn into one giant synchronized human metronome with the balls swinging from side to side in complete harmony.
The video has to be seen to be believed but we are sure you'll click the repeat button at the end of it.
Entraînement U15@FCMetz_officiel. Échauffement #SenseBall#Cogitraining . Création, réflexion avec @BANTOINE_FCMETZ pic.twitter.com/dbqe2wwDOl
— Reydel Vivian (@ReydelVivian) October 12, 2015