Think about this one: Why is it when a package is sent across town it is a shipment but if it goes across sea it is a cargo?
Q. What's the difference between roast beef and pea soup?
A. Anyone can roast beef.
Q. What do you get when you cross a pit bull with a collie?
A. A dog that runs for help ... after it bites your leg off.
Q. What does it mean when the flag is at half mast at the post office?
A. They're hiring.