Right before the end credits, as Grave Robber says "But Genco may survive if it undergoes surgery", right as Grave Robber says the word "may", his lips briefly don't match what is being said. (Confirmed in DVD commentary.).
In the original cut of the film, the Grave Robber character was in more sequences, and directly interacted with Shilo more often. During editing, in order to get the film to a shorter running length, several of his scenes were cut, and he became more of a narrator in the film than a featured character.