$10 - Shorty, Flop Nut in BB... line?

[pfapfap]

How'd I play this?

No Limit Holdem Tournament
Blinds: t400/t800
(Ante: t100)
7 players
Converter

Stack sizes:
UTG: t32395
UTG+1: t21395
MP1: t37345
CO: t50338
Button: t25830
SB: t39912
Gyro: t13285

Pre-flop: (7 players) Gyro is BB with 5[img]/images/graemlins/club.gif[/img] 4[img]/images/graemlins/club.gif[/img]
UTG folds, UTG+1 calls t800 <font color="aaaaaa">(pot was t1900)</font>, 3 folds, SB calls t400 <font color="aaaaaa">(pot was t2700)</font>, Gyro checks.

Flop: 5[img]/images/graemlins/spade.gif[/img] 5[img]/images/graemlins/heart.gif[/img] 4[img]/images/graemlins/spade.gif[/img] (t3100, 3 players)
SB checks, Gyro checks, <font color="#cc0000">UTG+1 bets t800</font>, SB folds, Gyro calls t800 <font color="aaaaaa">(pot was t3900)</font>.

Turn: J[img]/images/graemlins/diamond.gif[/img] (t4700, 2 players)
Gyro checks, UTG+1 checks.

River: A[img]/images/graemlins/spade.gif[/img] (t4700, 2 players)
<font color="#cc0000">Gyro bets t2000</font>, UTG+1 calls t2000 <font color="aaaaaa">(pot was t6700)</font>.


Should I have just bet out?