One stepped out of his group, went towards Pertry and hit him in the face, telling that the mockery with the Black Brigade should stop once and for all.
Pertry didn't know what he had done wrong.
Probably, he just had a big smile on his face while looking forward towards his first match at the highest level of Belgian football.
Pertry ended his career as football player with Cercle Ieper, but would return to Cercle Brugge as youth coach.
Before the 1966-67 season, Cercle Brugge were looking for a new head coach.
Marcel Pertry (assistant manager at that time) and Urbain Braems were the biggest candidates for the vacant position.
Both had to give to the Cercle board their vision about football and how they would implement it in the training sessions.
But due to the Cercle board not reaching a consensus, Frenchman Jules Van Dooren was finally chosen.