50 NL i won the hand but his play boggles my mind

[johnnyknish]

PokerStars No-Limit Hold'em, $0.50 BB (9 handed) Hand History converter Courtesy of PokerZion.com

Hero ($44.80)
SB ($60.45)
BB ($42.25)
UTG ($20.10)
UTG+1 ($48)
MP1 ($17.70)
MP2 ($57.25)
MP3 ($46)
CO ($62.30)

Preflop: Hero is Button with 2[img]/images/graemlins/diamond.gif[/img], K[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">2 folds</font>, MP1 calls $0.50, <font color="#666666">1 fold</font>, MP3 calls $0.50, <font color="#666666">1 fold</font>, Hero calls $0.50, SB completes, BB checks.

Flop: ($2.50) 7[img]/images/graemlins/diamond.gif[/img], J[img]/images/graemlins/diamond.gif[/img], 4[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(5 players)</font>
SB checks, <font color="#CC3333">BB bets $41.75 (All-In)</font>, MP1 folds, MP3 folds, <font color="#CC3333">Hero raises to $44.3</font>, SB folds.

Turn: ($88.55) A[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players, 1 all-in)</font>

River: ($88.55) Q[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players, 1 all-in)</font>

Final Pot: $88.55


now i don't seem him gaining any value from this hand unless someone calls him with the lower flush here and maybe a set so why do it? he had Q [img]/images/graemlins/diamond.gif[/img] 5 [img]/images/graemlins/diamond.gif[/img] by the way