 FAKE: While cutting the bullet out of Robins heel, to prevent him  from being blood poisoned by the metal in the bullet, Batman gives  Robin a strip of heavy cardboard to bite down on. After the  emergency surgery, Batman removes the cardboard strip from Robins  mouth, then motions as if to return it to his utility belt; however,  from the camera angle, we can see that he merely drops the strip at  his side.