The Speeding Nun.

A cop pulls over a car load of nuns....
    
Cop:  "Sister, this is a 65 MPH highway -- why are you going so 
       slow?"      

Sister: "Sir, I saw a lot of signs that said 22, not 65."
    
Cop:  "Oh sister, that's not the speed limit, that's the name of the
       highway you're on!"
    
Sister: "Oh! Silly me!  Thanks for letting me know.  I'll be more 
         careful."   

At this point the cop looks in the backseat where the other nuns are
shaking and trembling.
   
Cop: "Excuse me, Sister, what's wrong with your friends back 
      there?  They're shaking something terrible."

Sister: "Oh, we just got off of highway 119."