The barman says "I'll serve you, but don't start anything"
or
I better not tell you, it might spread.
or
I said, "I've been on telly but I'm no Dean Martin".
or
2 years old.
Cow: "Mooooove over"
Sheep: "Naaaaaaa."
or
Two — one to change the bulb, and one to write a song about how good the old light bulb was.
or