Tell him the key signature has 8 sharps.
or
it had blown away.
or
You can unscrew a light bulb.
or
Now I can't get the cobwebs out of her hair.
or
Night manager at McDonalds
or
Because he had no BODY to go with.
or
but unfortunately she'd popped her clogs.
or
Stop bugging me!
or
Half a worm.
or