Big stack takes very weird line...

[iStackBooks]

This is a hand from the FT $30 rebuy. I chose to post it here instead of SS because this tourny played more like a high buy in and w/ many big names in the small field and still alive late(P0KERPR0, apestyles, chipsteela, AJK, mr. big, the list goes on). Obv switch it over to SS if needed.

Around 60 left, I was active early but tight since the rebuy period ended. BB is unknown but has a monster stack of 30k+. I have around 9k.

Blinds 80/160
I'm on the button with A [img]/images/graemlins/spade.gif[/img]9 [img]/images/graemlins/spade.gif[/img], 1 MP limper, I raise to 455, bb calls, limper folds.

Flop: Q [img]/images/graemlins/diamond.gif[/img]7 [img]/images/graemlins/club.gif[/img]5 [img]/images/graemlins/heart.gif[/img]

Pretty dry flop, I make my continuation bet of 795 into 1100 or so. BB calls.

Turn: Q [img]/images/graemlins/diamond.gif[/img]7 [img]/images/graemlins/club.gif[/img]5 [img]/images/graemlins/heart.gif[/img]9 [img]/images/graemlins/club.gif[/img]

BB min leads into me for 160. What the hell? I was pretty sure I had the best hand but this is so weird. Do we just call for pot control? I'll stop here before discussing the river.