Pop Out Quarter Window ?

If you make them too tight then you can't run over and slap them from the outside easy when it stats to rain LOL!

Mine close the second I start rolling in the Demon above 10mph. I thought it was a safety thing. When I was a kid in the 70's, I had to sit in the rear with no AC in my parents 340 Demon.
As my Dad ripped thru the gears they would always close and we were hot. No seat belts, just 2 x 55 mph for cooling.