We are in an office. We see different people falling off a chair, always at the same desk, in front of a man in a suit wich is seated in front. This scene is repeated several times in rapid succession. Black screen, we can read : ARE YOU SITTING DOWN ?The camera angle changes to zoom on the head of the man in the suit behind the desk . It’s a Citroën Salesman who is revealing to his customers the "stunning offer" on the car that each of them has test driven. We hear him talking and see another client falling down his chair.