I respectfully disagree with the play on this page. First, the free card play is considerably less useful (if at all) in NL because the damage done by a re-raise or a big turn bet can be so devistating to your draw. Second, this gives an example of a particuarly uncommon, interesting and profitable situation. You technically have a bust hand, but between your inside straight draw, flush draw and maybe 2 overs (well in this case 1 over, but you don't know that) you're probably a favorite to win the hand once the turn and river are out. Yet, the turn is likely to make you not a favorite to win. There is already $6.50 in the pot between pre-flop betting and his bet. I would push him all-in here.

By going all in, you push your small edge on the flop and give yourself 2 ways to win (he folds or you win showdown.) You also eliminate any chance of him betting you off your hand, or being spooked by the turn. It's win/win either way. These kinds of situations are what NL is all about! Particuarly given that this is a cash game where busting out in a ~60% win situation is not a concern.