Any heart, Ace, King, Jack or 8 is bad for your hand. Not only because it will complete a bunch of draws meaning you could be losing, but it also makes the board look very dangerous making it less likely he will pay you off with a worse hand. Say he has T9 for bottom two-pair, and a the
![The Jack of Hearts [Jh]](https://pofex.com/images/smilies/Jh.gif)
falls. There's now a one card straight on the board as well as a possible flush, and if you were holding QJ, you just out drew him. He'll probably happy get his stack in on the flop with T9, but after the
![The Jack of Hearts [Jh]](https://pofex.com/images/smilies/Jh.gif)
falls he's much more likely to shut down.
On the flop you're only behind J8 and KJ, and crushing everything else (except a nice combodraw like
![The Ace of Hearts [Ah]](https://pofex.com/images/smilies/Ah.gif)
[Jh] of course. He'll stick it in with QT, Q9, T9 and of course lower sets. The situation can only get worse on the turn (unless the board pairs) so do it now. Also, this will balance your play for when you push with a draw like
![The Ace of Hearts [Ah]](https://pofex.com/images/smilies/Ah.gif)
[Th] or JJ here.
And you may want to be a bit more cautious about your shot taking... playing scared money with a big chunk of your BR in play is not +EV. And you ARE playing scared money of you even have to consider doing anything other than pushing here.