ROBOT LIE DETECTOR

John was a salesman's delight when it came to any kind  of unusual gimmick.? His wife Marsha had long ago given up  trying to get him to change.?  One day John came home with  another one of his unusual purchases.? It was a robot that  John claimed was actually a lie detector.
 
 It was about 5:30 that afternoon when Tommy, their  11-year-old son, returned home from school.? Tommy was over  two hours late.
 
 "Where have you been?? Why are you over two hours late  getting home?" asked John.
 
 "Several of us went to the library to work on an extra  credit project," said Tommy.? The robot then walked  around the table and slapped Tommy, knocking him completely  out of his chair.
 
 "Son," said John, "this robot is a lie  detector.? Now tell us where you really were after  school."
 
 "We went to Bobby's house and watched a
 movie," said Tommy.
 
 "What did you watch?" asked Marsha.
 
 "The Ten Commandments," answered Tommy.? The  robot went around to Tommy and slapped him again, knocking  him off his chair once more.? With his lip quivering, Tommy
 got up from the floor, sat down, and said, "I am sorry  I lied.? We really watched an R-rated movie."
 
 "I am ashamed of you, son," said John.?
 "When I was your age, I never lied to my
 parents."? The robot then walked around to John and  delivered a whack that nearly knocked him out of his chair.
 
 Marsha doubled over in laughter, almost in tears, and said,  "Boy, did you ever ask for that one!? You can't be  too mad with Tommy.? After all, he is your son!"
 
 With that, the robot immediately walked around to Marsha  and knocked her out of her chair.

OOPS!!

Thanks to

 Earl Bowings