None. They will never find a bulb that burns as brightly as the old one.
or
Anything you like, he can't hear you.
or
When it's going cheep!
Did you hear the one about the crow and the telephone pole?
He wanted to make a long distance caw.
or
The lettuce came in ahead, the egg got beat and the faucet is still running.
or
Do you want to grab a bite?
or
She couldn't control her pupils.
or
They turn from notating nuclear spins to notating unclear puns.
or
An envelope.
or