As birth/rebirth was mentioned in class concerning the cannons and gunshots, I think it goes much further and encompasses every character in Fast Cheap and Out of Control. Forming animals out of a bush, like a sculptor with marble can definitely be understood as a type of birth in order to please a spectator in a garden. The mole rats were taken out of their natural habitat to a new life in captivity in order to be studied and viewed for educational as well as enjoyment purposes. Obviously the creators of the robots give life to their machines, and as already mentioned the circus has many such events. I think even training these animals to do such marvels is a sort of rebirth for them (as well as the other performers) in the entertainment and talent sense.