Visible crew/equipment: Maria is preparing to leave the catacombs and Rotwang has sneaked in to kidnap her. He diverts her attention by throwing a loose brick to the ground a short distance from himself. Maria is then standing deciding what to do. A cord or cable (possibly an extension cord) is visible on the ground behind her on her left. She turns to her right and walks. Her left foot then her right foot gets tangled in the cord.