In the Péricourt house, Albert hides behind the curtain so Pradelle cannot see him. Outside, the car lights are suddenly turned on and his silhouette appears through the curtain. But in the next shot, Pradelle gets to his car which is parked backwards against the house. The lights could not have created Albert's silhouette.
When Edouard Péricourt jumps from the building, the Eiffel Tower is visible in the background, but this was not possible until 1989 when the Eiffel Tower got its illumination.