Originally Posted by snowboard789
so it must be unusual for me to fold a made 9 on 5th as a general rule even against scary boards yes?
No one said that. What people said above is that, since villain only flatcalled on 3rd, there has to be something wrong with villain's hand to begin the hand, so villain here isn't as strong as she looks. That's the only reason you'd continue here - the possibility that villain has a 10 down or a pair behind or whatever.
If instead you started with 4, you raised, some super-nitty villain 3bets with a 5 up, you call, and your hands look like this on fifth:
you're almost always drawing dead to runners now and you should almost certainly fold your made 9.
Reads (on what types of hands villain will play to start, and how villain will play a good board but bad downcards) are really important in spots like these.