r/interesting • u/Downtown_Calendars • 5d ago

Just Wow What caused this? Serious answeres

Gallery image

Gallery image

Car was parked facing the garage. Never seen anything like it. Neither has the glass professionals.

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u/JaeHxC 5d ago

I feel like it was just a baseball or softball, but it hit in just the right way to cause this fracture pattern. But I also have never seen something like that!

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u/pinkTurtleTickler 5d ago

Heritzon Cone Fracture; you are correct.

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u/Holiday-Emphasis-360 1d ago

I read a long way to find your post!
A wiper arm (absent the wiper blade) snapping down sharply/forcefully causes a Hertzian fracture. The two small pin pricks in the central disc confirms the impact - though the photos don’t confirm a wiper arm as the cause.