Hard one there, alot of money at stake. you almost have to put him on an open ended straight that caught on the turn, that or a straight bluff. with that much money its hard to say... you almost have to be there, spur of the moment. its either you get that flush or your out so the question would be.. do you feel lucky?but then agian why the 2$ raise pre-flop.. on Q9? maybe but i dont know lol more realistic saying he had J 10 2 pair.. but depends on how he plays. loose he had Q9 semi conservative he had J 10 conservative he had JJ or 88 haha take a pick