Mixed Metaphors

That is priceless annodomini.I can't think of any at the moment but will reflect on it.

My son who had a recent health scare, wrote in his wife's birthday card, " there is light at the end of the tunnel just around the corner."

Not mixed metaphors, but I once worked with a manager who said, "Right team, shoulders to the wheel, ears to the ground, noses to the grindstone and heads below the parapet".
I am pretty supple, but I couldn't manage all that at once.

I worked with lots of Polish people many years ago and at a colleague's retirement party one of them suggested we should drink to 'the new sweep'. (Which was me as I was talking on her job.) We didn't like to tell him it should have been 'broom'.
He also said he had lived in the area 'monkey's years'.

Could someone please tell me what is wrong with "to cement the thaw"? It's not as though they were suggesting e-freezing it.

re