Critical Manners? Kinda defeats the whole point of Critical Mass, but maybe that's the goal. As someone who frequently rides in Critical Masses, I can say that I've never gotten into a conflict with a motorist during the ride. I have yelled at motorists though just riding day to day in Chicago. During the mass, most people seem to have fun and most motorists seem to wait patiently and sometimes toot their horns enthusiastically. Like everything though, it only takes a couple of assholes to cause trouble. You get the over-aggressive bikers that start to cork a car and then the driver becomes irate and starts screaming and revving his engine like he's going to hit people and then, trouble.