Yes. The first car Papa had with seat belts (they were behind clips in each side of the car's roof). We were coming back from an outing on the bridge when we hit black ice.
We'll, I should say, Papa had to break quickly due to two swerved cars at the bottom part of the bridge. Unfortunately, due to black ice, we slid into them and then it was just a ricochet pile up.
Thankfully, no one was driving over 30 mph. So, no major injuries. Most of us were kids in the backseat. The injuries were eggsize bumps on foreheads. Exactly, where our heads hit the window glass, as we were bumped by other vehicles.
Two hours later, after each car was cleared from the scrum, we were all checked by Ambulance services. Another two hours later and we were finally back home.
On Monday morning, Papa unclipped those seatbelts and from that day on, he insisted we wore them seatbelts. That was 1970...
If we got into any car that didn't provide them, we just didn't ride in that car. Papa was adamant about it and I believe he campaigned ferveotl make them compulsory.
I hit the glass so hard that day, I sprouted a duck egg size bump. I was told what happened in the aftermath as I've no recollection. I woke up in my bed days later, minus the lump.