i hope it is not just a case of

Officer - "Do you know how fast you were going back there?"
BPO - "Sorry officer but I thought someone was chasing me? he says looking back over his shoulder"
Officer - "There MAY have been but it seems that there is nobody there now? Where did this mysterious 'chaser' come from?"
BPO - "If I knew I would have stopped and offered him a lift"
Officer - "Please don't do it again because I know you are sorry and I know you honestly don't know why he was chasing you"
BPO - "Thank you for the pep talk officer, I promise not to do it again. Have a nice day."

BPO - thinking to himpself ...... "i wonder if that 'chaser' will come back now that he's probably seen me talking to mr policeman?"

he he he