>>90887356Jack was outnumbered and in the open. He sprinted for the ruins because he knew he could use tight corridors and blind turns to obviate their numbers advantage somewhat, and possibly hide from them if necessary.
>>90887642The sonic dagger causes objects it strikes to vibrate at their resonance frequency until they violently explode.
>>90887417Tartakovsky has always liked to use a wide mix of cultural looks and music for his scenery. This is nothing unusual, really. I doubt it has deeper meaning.