Canadians - in general - are a lot more reserved than Americans. We tend to hold back and keep in our anger / feelings where Americans would just let it out.
Let's say a car swerves over the center line briefly and nearly hits you. If you were Canadian you might swear under your breath and drive away and talk about it with someone close to you later on in the day. If you were American you might roll down your window and tell them to go fuck themselves or give them the finger.
That is a generalization though, so nobody better get offended by that.