What were the chip stacks? And im assuming this is NL?...Well, if it is NL, then i would say to re-raise the flop. If you get called, then check/fold to the river. If you get re-raised, then fold.Folding to a .50 bet seems kinda stupid, since you've got the pre-flop raiser advantage.If you call, then you lose the pre-flop raiser advantage and are just wasting that .50 since you probably won't hit that 9.