That's all I said - in a perfectly calm, even-tenored voice, not a shout - to this old geezer who tried to pull into a roundabout across my path, just now. He was pulling a light trailer, which would have made an 'encounter' that much more interesting. He genuinely hadn't seen me and the horrified, startled look on his face worried me for an instant - he must have been in his late seventies and just then my thought went 'heart attack?'...
But - what the hell - I'm not far short of sixty, myself. I'm so used to this sort of incident, it's so commonplace, that I never venture onto a roundabout without expecting it, nowadays. I could have stopped before hitting him, if need be.
I merely slowly shook my head and cycled on... I feel good about not having actually shouted or mouthed obscenities (as I so often do).