[timmer]

Well Im thinking there is a good possibility the guy has a flush draw and two paired on the river. So. a check raise ON 6TH will likely cost you be his folding if you check raise on a small card.

OF COURSE THERE AREN'T MANY PLAYERS THAT WILL CHECK RAISE AS A SEMI BLUFF ON AN EXPENSIVE STREET. SO THIS TYPE OF INVERTED REVERSAL WILL LIKELY MAKE HIM FOLD MOST HANDS YOU CAN BEAT WITHOUT IMPROVMENT.

I say just keep betting as he thinks you are betting thin and his secondary outs can win if he hits once.