As the lorry goes along the road with Griggs and his men in it, the color of the lorry changes from green to blue. Shortly after one of the men says "that's Mr Randall's car", the lorry is green again.
Geoff insists on taking 'Marty the imposter' in his car back to wherever he is staying. When the car is viewed from the outside only the driver is in the vehicle as it proceeds on its way.
The sleeping dog's eyes are obviously open.