About 14 mins and 20 seconds into the movie (Chapter 5 if you have the DVD) is a scene in which April is being questioned by Lord Norinaga about where his son is. During the questioning, April’s walkman will begin playing music. Lord Norinaga then orders his guards to destroy it, which they do. However if look at the walkman carefully you can see that the batteries have fallen out and yet the walkman continues to play music plus you can also see the walkman’s mechanics/machinery still working as well.