Double fork leads to resignation

 I greatly enjoyed this moment in a blitz game. The situation felt pretty even, and complicated, with a lot pieces near each other. 

 I noticed his queen and king could be forked by my knight, but sadly that square was defended. Then I saw I could bring my second knight to attack the same square - Nf4!  Would it work?

Yes!

I brought my first knight to e6, he captured it and then I brought the second. He resigned :)