He can't let go of his ace. Bizarre number for a check raise though.

I don't see how he can fold the river push. Pushing=serious -EV.

200 NL isn't really a bluffing place anyway. You could have checked the turn even though to any good player it would have been obvious what you had then bet the river had you hit. It'll usually get paid off anyway.

There aren't too many people at 200 NL you could even get away with this so don't try.

I would absolutely bet that turn if he takes that long to call. Turn call means he's just decided that if you have him beat so be it.

Heard this story a number of times. You know he's weak--he knows he's weak yet he won't fold.