Exactly.
He'll probably want a medal because he "stopped you from speeding into the junction ahead" & therefore saved lives by crashing into you.
I can't remember what the stopping distances are, but if you're doing 30mph+ (using his superior speed judging abilities) with 15 metres to stop, I'm pretty sure you wouldn't stop in time. You have stopped before the junction so how can he even have the nerve to say something like that?
Did you ask him how he knew you were speeding? Rather than concentrate on his own driving / corner taking, did he have his speed gun pointing at you?
This bloke sounds like a pathetic wimp who can't face up to his responsibilities. What a moron.
Make sure you let the insurance know the weather was raining / drizzly yesterday, which is probably one of the reasons he lost it round the corner, plus the fact HE was the one speeding, and looking at the lady.