system
A chat on subreddit /r/pcmasterrace
human
Tempered glass vs sand-sized grain of ceramic.  
  
Grain of ceramic wins every time. Don't even need to "drop" the glass panel - just place it on a ceramic surface to get a microscopic scratch and it'll explode.
gpt
What I don't understand is how car side windows are made of tempered glass, but aren't broken by a grain of ceramic.

Thieves have known for a long time about 'ninja rocks', broken bits of spark plug or other ceramic which they throw at the side windows. But even these don't actually work that reliably, they'll bounce right off unless a sharp part of the plug contacts the window with enough force.

I'm guessing that car windows are just made to a higher standard than pc case windows!