[Gramps]

In the moment it may throw you off esp. if you're not playing many SNGs, but against a good player who knows you're a good player, not shoving PF with J9 and then folding to a push is terrible. Even on that bad board (and I say "bad" b/c of the 3 and 4 as much as the hearts) my guess is you have plenty of equity to call getting close to 3:1. I'd be surprised if he had a card higher than a ten, though it makes sense to do it with some stronger hands for the heck of it since a good player is probably going to call your complete-push too...

...unless you have like 62o or something, if you were going to call a push, it's fine to just shove PF. A good player is folding (pre-flop or postflop) after completing here about 0% of the time, why encourage them (and others watching) to make future foolio plays against you?