I had a 1971 Gremlin too. Remeber that back window? Tiny little metal hinges holding it on?
Mine rusted. One day I was just driving down the road - damn window just fell off the damn car. Busted all over the road.
Just Damn.
LOL - ok, that is a new one ...
I have all kinds of parts fall off of my various rust buckets in my younger days - a fender, the brake lines, once even, the A/C unit...
Bu I never had a window fall out.