A police man stops an old lady in her car. He strolls up to the car and knocks on the window. "hello madam, do you know how fast you were going?" the woman replies "oh yes!" the police man says " you know you were doing 20mph when you should be doing 60, is there a problem?" "oh no" the woman replies. policeman says " well, you really should pay more attention to the road signs madam" woman replies " but i have been, this is the B20, i was doing 20" Policeman laughs " the name of the road is not an indication of how f.... hey, why is everyone in the car so white with shock?" "eh?" squeals the old lady. policeman says " where have you just come from?" the old lady says " we've just come off the A120.... why?"