Is there a name for this tactic?

I was recently playing a game and I played a tactic that I found interesting and I was just wanting to know what you would call it. 

Here's the position:

It seems like you unpinned your f-pawn which caused the white knight to be left hanging as you were threating mate on the move. Looks like mate in 1, 2 or 3 depending on what white does after 7... Qh6.

I call moves like this a double attack (although it's not a double attack in the text book sense).   You threaten mate and the knight (the knight wasn't threatened at first due to the pin).  You un-did the pin and threatened mate at the same time, so a double attack.

You could call it taking the initiative (a chess term meaning making the strongest threats thereby dictating your opponent's responses).

Or more loosely, you could call it a counter attack.

7.. Qh6? How about: mistaken mating threat - did white resign at that point?

By the way, IMO thinking of situations like this as simply a different instance of double attack makes them easier to spot in a game.

Yeah, double attack seems to be the best way to describe this, thanks.

It IS a mating threat, albeit a defendable one.  White loses his queen to defend the mate via Qxf4 exf4 Kxg2 and black has a a pretty crushing advantage.

EDIT

Better is h3 fxe6 but still leaving black a knight up.

I agree "defendable" is a better word than "mistaken".

It seems your opponent just slipped the g2 pawn.

8.h3 fxe6 leaves Black with a mate threat....9.Qg4 Rg4 followed by Qh3 OR 9.Qe6 Qe6 10.de6 Rh7 and mate next move

I didn't see that one, interesting. The computer analysis of this game had 8. Qxf4 exf4 9. Kxg2 fxe6 10. h4 Qxh4 11. Kf3 Nf6 12. Ke2 exd5 13. exd5 f3+ 14. Kd3 Qh7+ 15. Kd2 Qh6+ 16. Kd3 Qg6+ 17. Kd2 Qg5+ 18. Kd1 Qg2 19. Ke1 Re7+

That computer analysis (and other people's comments) is really something. What I thought was a simple mate in 3 (I missed the h3 white pawn move being defended by the white queen) turned out to be even more involved when the mate threat turned out to be white trading a queen for a black rook and knight (10 points for 8 points) with the game potentially going on for several moves after that.