It doesn't seem like extrawork (except for fixing the breakables that have already been made) to only
poopulate a break sound on the last child of the heirarchy of an object
that is meant to shatter.
There is a fundamental connection between technology, physical reality and nature. And the parallels between technology and nature are astounding.
Smolka's Postulate reveals that cars have systems that match that of animals; ie: gas tank - stomach, catalytic converter - liver, carburetor - lungs and so on. A computerhard drive needs to defrag every so often, like a mind needs to dream(believing that doing so consolidates information in the brain).