Chicago bicyclists are a hardy bunch. Even in the freezing cold of winter there are plenty of bicyclists on the road. Please remember to always check your rear view mirror before exited your vehicle when you park on the street. Opening a vehicle door into a cyclist's path is extremely dangerous and can cause serious injury and even death. In the past I've written about steps bicyclists can take to avoid getting doored. Recently, I found the stylish and amusing video below on the Urban Velo website which I hope will serve as a reminder about the serious danger carelessly opened car doors present to bicyclists.