I really have to say I was blindsided by this one. I did not think he was flatting me on the flop with a 7. Is this a stupid play on my part? I really thought he had overs or a flush draw or something like that, and with the pot already fairly large, I wanted to either end he hand or make him p[ay to catch up.

Full Tilt No-Limit Hold'em Tournament, 20/40 Blinds (9 handed) - Full-Tilt Converter Tool from FlopTurnRiver.com

MP3 (t3510)
CO (t3070)
Button (t2280)
BB (t4520)
UTG (t4555)
UTG+1 (t3760)
Hero (MP1) (t6290)
MP2 (t3075)

Hero's M: 104.83

Preflop: Hero is MP1 with 9, 9
1 fold, Hero bets t100, MP2 calls t100, 3 folds, BB calls t80, UTG raises to t160, Hero calls t60, MP2 calls t60, BB calls t60

Flop: (t640) 7, 3, 4 (4 players)
BB checks, UTG checks, Hero bets t420, MP2 calls t420, 2 folds

Turn: (t1480) 7 (2 players)
Hero bets t5710 (All-In), MP2 calls t2495 (All-In)

River: (t6470) 3 (2 players, 2 all-in)

Total pot: t6470

Results:
Hero had 9, 9 (two pair, nines and sevens).
MP2 had 7, 6 (full house, sevens over threes).
Outcome: MP2 won t6470