Was driving away and the rain was coming down earlier. Lights went orange so I slowed down and stopped. Then saw in my rear view mirror typical motorcycle idiot was driving too close, jammed on his breaks and wallop - bike into a skid and him on the ground. Got out to see if he was ok, along with a few others, seemed a bit shaken up but sound. daft idiot not aware of weather conditions. Later I was thinking, should I have waited for police or something? Then again what for? Its not a collision, just a daft idiot.