Because you can't tell the difference between a hat and a cap

While Bassie and Adriaan are lying in the trunk of the crooks' car, the crooks disagree about the difference between a hat and a cap. The scene then shows the car driving down a hilly road. This is the Hoge Duin en Daalseweg in Bloemendaal. The camera is on the outside bend at the Caprera open-air theatre, on the corner of the Hoge Duin en Daalseweg and the Zomerzorglaan. In the next scene, Adriaan looks out of the trunk. This is recorded just past the bend, in exactly the same direction down, on the Zomerzorglaan towards Duinwijckweg.