When things go terribly wrong...

I had just played my knight to e4 with the obvious intent of exploting the hole on f6. It would be nice to land the grand daddy of them all, a fork of the king and queen! However, the black knight on h5 is defending f6 at the moment. It does not take a chess master to see that sacrificing the rook on h1 for the knight on h5 can make the fork come true. In this position, my opponent decided to castle --- kingside! Oh la la...Why avoid a nasty fork by stepping into another one! Of course, the rook sac on h5 was made, and after PxR, nf6+ followed and the fork became a reality.