Only one, but it sure takes a shitload of light bulbs!
or
Because he never pays his debts.
or
Nothing, it just waved.
or
A dino-sore
or
It doesn't matter, they don't have any electricity any more.
or
Bozo The Clown has real hair on his head.
or
Because they kept saying "bach bach"!
or
I mean he did say he was a private tutor.
or
Climb up a tree and act like a nut
or
Because it's too far to walk!
or