Driver's License

A friend of a friend of mine was sitting on a lawn sunning and reading, when
he was startled by a fairly late model car crashing through a hedge and coming
to rest on his lawn.  He helped the elderly driver out and sat him on a lawn
chair.  "My goodness" he exclaimed, "you are quite old to be driving!"  

"Yes" he replied, "I am old enough that I don't need a license anymore."   "The last
time I went to my doctor he examined me, and asked if I had a driving licence. 
I told him yes and handed it to him.  He took scissors out of a drawer, cut the
licence into pieces and threw them in the wastebasket".  "You won't be needing
this anymore", he said.  "So I thanked him and left."

Thanks Kerry