Destroyed by a donk

[FGators]

WCOOP $2500+100 Main Event.

Outside the money; about 600 remain, 414 cash. I have 80k, average is around 110k. Blinds 1500/3000 with the ante. Folds to me in MP2 and I make it 7800 with 10 [img]/images/graemlins/heart.gif[/img]10 [img]/images/graemlins/club.gif[/img], folds to the really bad and donktacular BB who calls with his large 200k stack. He definitely seems like a satellite qualifer.

I have a nitty/tight image. I've been really card dead and there have been a lot of spots where I haven't been able to get involved. I've opened up a little bit more lately but if people are paying attention they know I haven't been out of line.

Flop: A [img]/images/graemlins/heart.gif[/img]9 [img]/images/graemlins/club.gif[/img]8 [img]/images/graemlins/spade.gif[/img]

he leads for 5k, I call (???) I hate raising and then folding to a shove. I honestly don't know wtf this bet is be it a set, an ace, a 9, a 8,a straight draw, a small pocket pair, king high,queen high.

turn: K [img]/images/graemlins/heart.gif[/img]

he leads for a massive bet of 7500 (sarcasm) into the now 30k pot and I fold.

Thoughts on how I played this?