A police officer pulled over a nun driving a car, and said, 'Ma'am, you're driving too slow, could you please drive faster?" And the nun says, 'Oh, I saw the sign with the "21" and assumed the speed limit was 21."

The officer explains: 'No ma'am, the speed limit is 65, the highway is 21." Then the police officer looks in the back and see the other 2 nuns shaking like leaves.

"Excuse me, Sister, but what's wrong with those 2?" "Oh, that's because we just got off Highway 145."