Alot of things, but one things I remember and never forget is these "wing windows". I remember as a kid always wanting to fiddle with these things and I thought they were so cool.
when I was allowed to sit in the front passenger seat I was constantly opening and closing these things. it was so cool
I recall some adults would use them to flick the ash off the end of the cigarette outside or they would sometimes hold their lit cigarette near it to let the cigarette smoke blow outside