(109) Bubble two pair with short stack about to post

[PacMann]

PartyPoker $109 Speed Tournament, Big Blind is t600 (4 handed) Converter on pregopoker.com

CO (t264)
Button (t1323)
SB (t12886)
Hero (t5527)

Preflop: Hero is in BB with 5[img]/images/graemlins/club.gif[/img] 3[img]/images/graemlins/spade.gif[/img]
<font color="gray">CO folds</font>, <font color="gray">Button folds</font>, SB (Thinks forever) calls t300, Hero checks

Flop: (t1200) 7[img]/images/graemlins/diamond.gif[/img] 3[img]/images/graemlins/club.gif[/img] 5[img]/images/graemlins/diamond.gif[/img] (2 players)
<font color="red">SB bets t800</font>, Hero??

Last hand he made a big call with AT for all but T200 of his chips on a board of AK8r. So he doesn't seem afraid to gamble with a micro stack about to post.
Preflop I nearly typed in the chat for him to push any two.