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This is from a game that I am still currently playing. I was in a playful mood, so I made an unsound sacrifice early on, and fortunately afterwards I was able to be technically a pawn up (a rook and four pawns for two minors and two pawns). I still didn't like the position very much though, and the light squared bishop was on a very unfriendly diagonal. What was worse, black was forcing me to trade queens! But on closer inspection, the move wasn't the devastating move it looked like...
Now now, no need for sarcasm. The puzzle is obviously aimed at people of a lower skill level than yours. I tend to watch games on the live chess server, and I can't tell you how many times I've seen combinations like this missed. If you want a harder puzzle, then visit the tactics trainer or one of the several other puzzles in this forum, not all of which are catered to you.