The K doesn't seem to scare me. Why? Well if villain has any brains he would have raised PF with AK to eliminate a few of the 5 people in the pot. If you're beat I think it is to a set or possibly A10. If he was an idiot and was trying to slowplay AK against 5 people I would have to say more power to him. I personally have a hard time finding a fold. He could easily be thining "he is in the SB and didn't raise PF he must have a weak A to bet that flop". I may be wrong but the fool moves people make always astound me.