Scaring the crap out of people is actually a really useful tool, Sunfish. Probably why you've never gone anywhere near a spin after one was demonstrated to you.
The same demo can be done fairly easily for IMC disorientation - in VMC.
Simply ask the student if they think they can tell the right way up without seeing a horizon, and nearly all respond yes. Get them to put their head in their lap with their eyes closed and commence a very slow increasing left roll (at a rate below the vestibular system threshold) for about 20 seconds. From at least 30-40AoB, then roll the aircraft right very quickly back to wings level. Fly along for ten seconds and ask them which way you are turning.
They always say you are banking hard right, and it f**** with their head to open their eyes and see the aircraft in perfect wings level flight.
Certainly seemed enough of a demo to most of my students to keep them well away from IMC.