I like pusing to isolate against the shorty. I think you will get a lot of folds from Riverplayer and his dead money will give you a nice overlay if you are against 2 overs. If you lose you won't be that badly off, and I think you are crushing the shorty's pushing range here. I would not be surprised to see a small pocket pair or Ax or some other garbage. I also think Riverplayer is folding most of the time to your reraise, as he's shown weakness twice in the hand.