I parked my car outside my driveway, it's clear from trees and nothing above it at all yet an hour later I came out and find a big circular crack. It's odd because I didn't find anything around it that could've caused it so I can't explain what it is. What can this be? I have insurance for windshield repair so I'm not too worried about that. I'm glad it didn't hit any of the panels but I'm curious what this was.
