I normally cannot do anything but twice there's been a reason for the car to stop and we have ended up next to them.

Our club was riding along a country road when a car overtook the paceline, just as we were approaching some road works. He ended up serving in front of the group, almost taking them out to avoid the cones on the centre line. But he had to stop- there was traffic lights controlling the road ahead as it was reduced to one lane and the traffic from the other side was coming through. He ended up sitting in the car looking very scared as 20 people on bikes pulled up behind him and we all gave him an evil look. When the light changed he let us ride through first and passed us slowly up the road. I think he learned his lesson! And we didn't have to say anything.

This weekend as we were riding a one way road with multiple lanes and moving into the right hand side so we could turn, a car zoomed up on our right side and then proceeded to cross the other lanes to the left hand side. But then the lights changed and we caught him. We yelled "what's the problem?" and he wound down the window and said "stay in your lane". I raised by eyebrows at that- he just cut over 4 lanes without indicating in front of us.