One Nut

Jilda and I were headed home today. She had some work done on her car and I drove her down to pick it up. We were on our way home and I was following too closely. I know this because a hickory nut fell and hit her car, bounced up into the air and then hit the windshield of my truck.
I looked over on the corner of my windshield and there was the tale-tale ding. Dang it! I exclaimed to myself.
When I got home, I asked if she realized the nut that hit her car, hit mine. She said that she didn't but when we looked in the corner of her windshield, there was a ding in hers too. What are the chances of that happening. One nut, two windshields.