This happened to my family when I was 9. It was in the early 80's and my mom's car was pretty old so the windshield shattered. It was pretty traumatic. I was in the front passenger seat and caught the brunt of the glass. My brother was in the back seat behind our mom. No one got hurt except for my mom and that was because she was crying and wiping her tears. Every time she did, tiny shards of glass would cut her. Oh, and I spit out a small chunk of glass the next day. No idea where it was hiding!