#15- off by 10 years. All vehicles manufactured after 1/1/68 were required to have seatbelts. Lap belts for all passengers and shoulder belts for the 2 front passengers next to the doors. I remember because my '68 GTO didn't have the shoulder harnesses and it was the last model year when it wasn't required.

I have to cop to pronouncing chaos as chay-os in my head until high school, even knowing what it meant from context. And I had a buddy stand up in front of a poetry workshop and use harbinger to rhyme with bar singer. He had no idea why everyone thought it was so funny, and when I explained it to him he thought I was kidding.