The lettuce came in ahead, the egg got beat and the faucet is still running.
or
Because they had so many knights.
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
It saw the ginger snap.
or
In the neigh-borhood.
or
One. You don't believe me do you? I've got photos! See that big blob? Well, just squint your eyes a bit. . . .
or