easy fold..?

[masonx]

Party Poker No-Limit Hold'em Tourney, Big Blind is t150 (9 handed) converter

Button (t900)
SB (t4847)
Hero (t4460)
UTG (t4620)
UTG+1 (t3290)
MP1 (t1675)
MP2 (t3435)
MP3 (t1575)
CO (t2760)

Preflop: Hero is BB with Q[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">5 folds</font>, CO calls t150, <font color="#666666">1 fold</font>, SB completes, <font color="#CC3333">Hero raises to t525</font>, SB folds, Hero calls t2235.

^^ CO went all in when i raised. something [censored]'ed with converter or something
Wasnt really sure what to do.. had no reads on him. Seems like a relatively easy fold to me.. but i thought he was on a resteal or w/e so I called D:/