Most people find trance states to be normal and natural. However, if they have not been to a reputable hypnotherapist before, some people have fixed ideas about hypnosis and are disappointed to find that it is not as they believed it would be. If people believe they haven't been in the right sort of trance, they can start to mistrust the process and, of course, this limits the results they will get. In fact, too deep a trance is usually ineffective for therapy as the client becomes unresponsive to the techniques of the therapist. The best trance is a focused state of inner awareness - your attention is on what is happening in your mind and what you are feeling, not on your surroundings.
Some people are afraid of being stuck in hypnosis if something happened to the hypnotist.
If you are left to wake up by yourself, you would either sooner or later open your eyes and be completely normal, or you would go to sleep and wake up normally. If you feel 'different' in some way after a hypnosis session, and if this bothers you, a reputable professional hypnotherapist should be able to help. Morris has, on occasion, helped people to complete experiences that have begun in sessions with other people. Ideally, you should seek further help from the original hypnotist, as your subconscious mind may simply be telling you there is some unfinished business to explore. If, however, you do not wish to return to the original hypnotist for any reason, do explain what is happening to another reputable, professional hypnotherapist and ask if they can help.