A woman is lying in the road after being run over. The driver of the car that knocked her down comes to her aid.”Are you all right?” he asks.”You’re just a blur,” she says, “So my sight is clearly affected.”Concerned, the driver leans over the woman in order to test her eyesight.”How many fingers have I got up?” he asks her.”Oh shit!” she replies, “I must be paralysed from the waist down as well.”