Watched another accident this weekend - Mapmaker
Sitting at red traffic lights with several other cars. The odd car passing across us.

Suddenly the Clio (sized car) in front of me sets off, despite the red lights. Much hooting of horns by watching cars.

Bang! Clio hits - travelling by now at quite some speed - car passing from right to left. Victim does 180 degree turn. Clio comes to halt, bits of plastic everywhere.

Being the decent sort that I am, I note the Clio's numberplate (wet finger writing on window) stop and leave my name and number with victim as a witness. Clio driver is nutty woman in her 50s. Victim is gentleman who is slightly older.