6... dxe5 7. Qxg4 Nc6 8. 0-0 Nf6
Sprung a Trap!
Excellent! I probably wouldn't have seen the mate and went straight for the queen-rook fork with 7) Nxf7.
I actually just got done playing a game with the 1) e4 e5 2) Nf3 d6 3) Bc4 opening as black. I'm glad I didn't fall for this!
This is just the tip of the iceberg:
http://www.chess.com/forum/view/game-showcase/legals-mate3
http://www.chess.com/forum/view/game-analysis/amaing-queen-sac-checkmate
http://www.chess.com/forum/view/game-showcase/poooooooooooooooooooooooop
http://www.chess.com/forum/view/game-analysis/legals-mate2
http://www.chess.com/forum/view/game-showcase/actually-pulled-off-legals-mate
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Here is one of my recent games: