While detained, Trailer flips a packet of cigarettes down to the street to try to smuggle a message out. However, the building in which he is held is in its own grounds. When the cigarettes land, the wall of the building can be seen abutting the pavement directly, but in the long shots the building is at least ten yards away, in a wealthy suburban setting.
When Mrs Steen is dousing the house in petrol, perhaps smoking a cigarette while doing it was not the most sensible thing she could have done.