(At around 11:00) Kowalski and Patterson are preparing to hunt the gorilla with tranquilizer rifles. Kowalski's rifle has the bolt open, which means it is not ready to fire. Later, at around 13:00, the group shoots at the gorilla but Kowalski's rifle doesn't fire. Amusingly, he tries to close the bolt and then stands there impotently pointing the rifle at the gorilla while the others fire.