Realizing I told the Dr joke already, here's another one.
Guy goes into a Doctors office and the Dr says
"You don't have very long to live"
Guy says "How long do I have left?"
Dr says 10
Guy says "10 what? 10 days? 10 weeks?"
Dr says 10, 9, 8, 7, pay your bill, 6, cash only, 5
Daniel