Dentist:

Dentist: You need a crown¹.

Patient: Finally, someone who understands me!

Airport:

Passenger: How often do planes crash?

Pilot: Just once.

Supermarket:

Cashier²: Would you like the milk in a bag?

Customer: No, just leave it in the carton.

Bus Stop:

Passenger: How long will the next bus be?

Driver: About 40 feet.