The director (a big RAFC supporter) insisted that actor
Gene Bervoets (a Beerschot supporter) whistle the anthem of RAFC in a scene where he's in the car (Beerschot and RAFC are both football clubs in Antwerpen, with 100 years of enmity dividing their fans).
Gene Bervoets, however, agreed to do as requested immediately. Since his character is a complete bastard, he thought it quite logical that he would be an RAFC-fan.
more