5nl pf raiser takes weird line

[qwertyas]

PokerStars No-Limit Hold'em, $0.05 BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

MP3 ($5.33)
CO ($11.72)
Button ($9.93)
SB ($5.05)
BB ($3.24)
UTG ($10.37)
Hero ($16.84)
MP1 ($2.80)
MP2 ($5)

Preflop: Hero is UTG+1 with 9[img]/images/graemlins/club.gif[/img], 8[img]/images/graemlins/club.gif[/img]. MP2 posts a blind of $0.05.
UTG calls $0.05, Hero calls $0.05, MP1 calls $0.05, MP2 (poster) checks, <font color="#666666">3 folds</font>, <font color="#CC3333">SB raises to $0.12</font>, <font color="#666666">1 fold</font>, UTG calls $0.07, Hero calls $0.07, MP1 calls $0.07, MP2 folds.

Flop: ($0.58) 3[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/spade.gif[/img], Q[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">SB bets $0.15</font>, UTG folds, Hero calls $0.15, MP1 folds.

Turn: ($0.88) Q[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets $0.15</font>, <font color="#CC3333">Hero raises to $0.7</font>, <font color="#CC3333">SB raises to $1.25</font>, Hero calls $0.55.

River: ($3.38) 8[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets $3.53 (All-In)</font>, Hero ???