 To achieve the scene in which the witches are flying over the roofs  of the town, Christiansen and his cameraman  Johan Ankerstjerne (qv) photographed a miniature town (with each  house about 2 meters in height) on an enormous turntable, which  operated manually and took the strength of 20 men to operate. Then,  several costumed actors were photographed on broomsticks against a  black background. To make the heavy costumes ripple in the "wind"  Christiansen brought in an airplane motor. A total of 75 witches  were photographed, each individually, and a special optical printer  was built by Ankerstjerne to put them together (only about three of  four appear on the screen at one time). The construction of a model  town was decided upon after test footage proved the original idea of  shooting from a movie train was a bad one, as too many modern  structures, not to mention telephone poles and wires, were  unavoidable. The test footage survives and is superimposed with  Christiansen seated in a chair, acting out the part of a witch.