Hmm, how can I lose this on the flop?

Poker Stars $3.00+$0.40 Pot Limit Omaha Hi Tournament - t75/t150 Blinds - 3 players - http://www.thehandconverter.com/hands/149133
The Official DeucesCracked.com Hand History Converter

BB: t4190 M = 18.62
BTN: t8700 M = 38.67
Hero (SB): t610 M = 2.71

Pre Flop: (t225) Hero is SB with Qs 3d 6d Qd
1 fold, Hero raises to t450, BB calls t300

Flop: (t900) 5c 9h 5d (2 players)
Hero bets t160 all in, BB calls t160

Turn: (t1220) Td (2 players - 1 is all in)

River: (t1220) 8s (2 players - 1 is all in)

Final Pot: t1220
BB shows Qh Ks Jd 3h (a straight, Eight to Queen)
Hero shows Qs 3d 6d Qd (two pair, Queens and Fives)
BB wins t1220