Ok, this was probably the weirdest thing that's happened to me in a long time. I was not expecting it at all...
I guess usually the rolfers go over these things with their clients at the beginning of the course, but my guy neglected to describe all the things that would be done to me. This session, he told me that they were going to work in my mouth and nose, and it really surprised me. I couldn't imagine what they could do in there, but ... I guess that's what they do. ;)
So he stuck his little fingers up my nose, and left them there for a while to try to let the tissue relax and expand... (they use rubber gloves for this stuff, by the way...) Then, he squeezed my tongue, masaging it from the back forward, and also worked the gums from the front all the way to the back where they connect to your jaw. It was pretty painful, but I guess I was pretty tight in some parts.
He said that for some people this stuff helps with neck tension, since the neck fascia is connected all through the jaw and mouth. Also, it works toward making your face more symmetrical. Unfortunately, I didn't notice any real effects from this session, other than being weirded out a bit. ;)