Villain is semi lose agro, this is a horrible board to bluff at and i don't see him double/triple barrel bluffing here, so what do you make of this turn bet, it just seemed really really odd to me...and what do you do now?

Full Tilt Poker Game #20375450991: $10 + $1 Sit & Go (156543659), Table 5 - 80/160 - No Limit Hold'em - 14:03:16 ET - 2010/04/26
Seat 1: Arkwings33 (2,070)
Seat 2: julitron69 (6,190)
Seat 3: Gjeddemor (3,440)
Seat 4: Festina_Lente01 (945)
Seat 5: PaoloMartino (2,330)
Seat 7: KNOWNFACTOR (5,230)
Seat 8: HIS MOM (7,355)
HIS MOM posts the small blind of 80
Arkwings33 posts the big blind of 160
The button is in seat #7
*** HOLE CARDS ***
Dealt to KNOWNFACTOR [8h 8c]
julitron69 raises to 320
Gjeddemor folds
Festina_Lente01 folds
PaoloMartino folds
KNOWNFACTOR calls 320
HIS MOM folds
Arkwings33 calls 160
*** FLOP *** [5d 2s 5h]
Arkwings33 checks
julitron69 bets 480
KNOWNFACTOR calls 480
Arkwings33 folds
*** TURN *** [5d 2s 5h] [6d]
julitron69 bets 800
KNOWNFACTOR has 15 seconds left to act
KNOWNFACTOR has requested TIME