it happens a lot to me. I just slip away. sometimes I can recognize it's happening, but not always.
I've learned, for me, general grounding doesn;t work (getting in touch with senses and such), but intensley cognitive tasks help, especially if it gets me thinking about something I enjoy (my animals, art, music...). We have figured out if I can't come up with something to say about the dogs, then I am still way too checked out to leave.
I would get freaked out by touch I think, though sometimes I crave it. I guess it depends on whenere I went and why. If we are talking about csa stuff, touch would freak me out, but if we are talking about just feeling depressed and unlovable and disconnected, I think touch tends to help.