Corrected entry: In the scene where, down on the surface, Astro Boy revives a construction robot and brings him back with the others to Hamegg, Hamegg uses a device to gauge how much energy the construction robot has. Then, he accidentally points it to Astro, and the device goes wild! The others ask what just happened, but Hamegg says that nothing's the matter. Just as the scene ends, we see Hamegg giving a very wry smile, and a few strands of hair on his head perform a slightly-skewed devil's horns, somewhat of an indication of the fact that he plans to do something bad with Astro.
rswarrior
15th Sep 2010
Correction: This is foreshadowing, not trivia.
rswarrior