The guide dog led his blind master directly through a green light out into the traffic of a busy intersection.  Horns honked.  Cars crashed into each other all around him.  A good Samaritan ran out into traffic and snatched him to safety.  The blind gentleman reached into his pocket for a treat.  “Good boy.  Good boy.  Here’s a treat!”  He patted the air, feeling for his dog’s head.

“Are you crazy?  He nearly got you killed?  Why in the world are you giving him a reward?” asked the good Samaritan.

“I’m not.” said the blind man.  “When I find out which end his head is on, I’m going to kick his butt!”