Here’s an interesting one; pain spinning. There’s nothing that particularly resembles a trance state, and yet the result sure looks like a negative hallucination (i.e. getting the mind to not perceive something that does exist) to me.
https://www.youtube.com/watch?v=jAYlt1OSUH8
Obviously this one picks up after the initial explanation, so if you poke through some of Snyder’s other videos, you can find the whole thing with intro, but there’s nothing that I would call a real induction either. Of course, in this case, it’s something the client wants very much, so the mind is more cooperative from the start, but still, it’s an effect generally associated with deep trance, happening in a fully aware state.