First he lies on one side, then he lies on the other.
or
Because it might crack up!
or
Executive Producers don't screw in a light bulb, they screw in a hot tub.
or
What's the use, they'd still have bear feet
or
he got a little behind in his work.
or
A comb.
or
Humpty Trumpty wants Mexico to pay for it all.
or