Move 15 ELECTRIFIED me!

I knew he wanted me to take his knight to disrupt my kingside cover, but after some 4 -5 min calculation I decided it was better for me not to take the knight

Good catch: 16 hxg4 hxg4 17. Nd2 Qh4 18. f3 is a very nasty line, though another option would be 16. hxg4 hxg4 17. Nxe5 dxe5 18. Bxg4 Qh4 19. Bh3 and you're up a pawn.

I saw the variation, but I also found 3 others here too, I chose this line instead