What shananigans have you done going down the road?

Yesterday I was telling my hubby about a time when my sister and I were going down the road on a highway beside my mom in her car. Nobody was around…we’re crazy kids…so we flash her. My mom has a hissy fit but it’s absolutely hilarious to us.
Today this guy was breaking his neck to look at me because I had my leg up on the dashboard in shorty shorts. So I threw my legs out the window, kinda spreading them in a ridiculous way.
As a frequenter of road trips, I love to get into mischief out there. What are some of the things you’ve done?