A quick Tactic from a game.

I just had a wonderful ending to a frankly bad game, I dropped pawns like I was paid to.
But then my counter play turned out to be very good.

We got to the following position

White can only play Qf2, and that is the position where I found the stunning move that secured a win for me.
Can you find the move?

In this position

Solution will be posted later if nobody finds it, but I am sure somebody will get.