flying stones tend to do that
and no windshield is impervious to rock chips.
you're not wearing the windshield on your lap...
so it must be doing what it was designed to do.
ride a motorcycle and see what happens
when that rock hits your sunglasses
I will only ride with a full face helmet
with an unbreakable safety face shield.
I've had rocks kicked up at me
and even once had a bird clip my face shield.
'bout all I could do was stay upright and on.
Be humble and satisfied... that those rocks didn't imbed into your forehead.
btw... rocks are not always round...
round rocks tend to do less damage.
rocks with sharp edges generally put us on the losing side.
Did you just recently stop riding the short bus ?