The barman says "I'll serve you, but don't start anything"
or
Three:
One to write the light bulb removal program,
one to write the light bulb insertion program, and
one to act as a light bulb administrator to make sure nobody else tries to change the light bulb at the same time.
or
Because it goes good with chips.
or
She kept running away from the ball.
or
Humpty Trumpty wants Mexico to pay for it all.
or
'It's not unusual' he replied.
or