first game: I dont understand why he resigned!?!

[Event "ICC"]
[Site "Internet Chess Club"]
[Date "2009.12.16"]
[White "nhkatz"]
[Black "Tinflash"]
[Result "1-0"]
[WhiteElo "1311"]
[BlackElo "990"]
[ECO "C21"]
[Opening "Danish gambit"]
[TimeControl "120+6"]

1. e4 e5 2. d4 exd4 3. c3 dxc3 4. Bc4 d6 5. Nxc3 Nf6
6. Nf3 Bd7 7. O-O Be7 8. e5 dxe5 9. Nxe5 O-O 10. Qc2 b5
11. Bd3 g6 12. Bg5 Nh5 13. Bxe7 Qxe7 14. Rfe1 Qg5 15. Be4 c6
16. Nxd7 Nxd7 17. Bxc6 Rad8 18. Ne4
1-0