I think that the 5$ bet is pretty interesting. But you can just make it if you are sure you can outplay this guy. He said something about AA vs. KK and he is loosing.
Now that should be a point were you can get him. Is he an actor? Does he think he can coffeehouse and make a play on you?
Now if you bet 5$ it is the same as checking. But maybe it is better than ckecking, because it seems weird and now he is able to fall out of his role as an actor, because it is a situation he doesn't expect. Look him closely. As Caro say, if he now does act other than he did before, he is bluffing.
Just make a play like this if you are sure you have better reading skills than him.

But I would bet half his remaining stack here. Have no reading skills. [img]/images/graemlins/crazy.gif[/img]