the check-raise bluff

What can I say. Most times people check-raise when they have VERY good cards -- and want to get as much money in the pot as possible b4 any players fold.

But most of the time, from what I see, the players already invested call the check raise.

So a check-raise might be the first stage of a bluff, but I wouldn't very often try and use it as the last stage.

Hmm, what about on the river, never seen anyone try and do THAT!