My first lightweight was a Peugeot PX10. In early November, 1971, I drove from Columbus, Ohio to Dayton to buy it and on the way back drove right into the middle of a riot at Ohio State:
http://univdistcol.com/riots7.html

At one point, I was slowly driving down Pearl Alley, near High Street, and a cop threw a kid onto the hood of my car and beat him with a nightstick. I finally got to my sisters apartment (I had borrowed the car) and decided to take a ride on my new bike. I mean, who wouldn't? After dodging a tear gas canister, I decided to ride another day. Good times.