Many years ago when driving in the snow along a dual carriageway I overtook a string of cars, virtually every one driven by a doddery old fart accompanied by a wife who looked like a witch licking piss off a nettle. I was given the wagging finger of disapproval by more than one. After the overtake I held at a roundabout in the outside lane. As I waited the first car arrived and stopped. Then the entire string of cars clattered into the first one shoving him into the traffic on the roundabout. I really enjoyed wagging my finger at them and telling the insurance company investigators what happened.