I'm in the small blind getting dealt JJ99. I don't like putting in a raise simply because I'm first to act when the flop hits.
Since I did raise though, and on the flop I'm being bet at by a tight player who doesn't get out of line, I can assume the play is coming out like this. LP: "Raiser has a high pair or a wrap ... probably aces ... if I call and hit ... maybe I can take his stack."
In this instance I would be putting villain strongly on 2 pair minimum, probably a set, and at least a blocker for the flush draw if not a better one himself. I guess I'm basically saying that post-flop, I'm counting on a hit to make my hand and take down the pot. I'm not entirely sure that even hitting my card will work, as it's possible I could be outdrawn.
I think overall here, I'm probably calling the flop bet (maybe), and then folding. I really don't like this hand in early position, facing action, and relying on a hit (a 15-outer albeit) ... which may or may not take down the hand if it does. I figure I've got 7 clean outs, giving me about a 30% chance for a nut hand. Really, I wanted to set it or forget it on this hand ... rather than face down a relatively weak draw against a made hand and a possibly better draw.
Of course I'm a passive-weak-tight nit, but you know.

I can see the possibility of villain holding a wrap, in which case we may be alright since we're holding blockers to his play. 2-pair still being a possibility of course.
I guess in the overall getting the stack in isn't a huge mistake against villain's range ... but I'd be sweatin' doing it, and probably expect to lose the pot.