[cbboy]

I wouldn't put doing something like that past him. These players can get retarded and show up with the most ridiculous things at times. He could just be thinking that he has a K and that its the best or that he has a flush and he is hoping you have a K. You really don't know with these kinds of players. They can do very retarded things at times. However, without any sorta read, I think you're right that this is a fold. River c/r-es are generally the nuts, right? Especially from players like this...