As Bobby realises he's late for his date with Kim, Tommy forces the teacup onto him; some of the tea spills onto Bobby's shirt and starts to seep into a stain. However there is no sign of the damp spot in all subsequent shots during the scene.
The positions of the policemen on the farmer's motorbike change depending on whether they are in close-up or long-shot.
During the car/bus chase people clearly get on when the bus stops but at the end of the chase the bus is empty.