I love being in an isolation tank... so much so that I have been saving my pennies to have a custom one made for my home
Now that is cool.
I actually experienced an unexpected altered state in 2005 (not drug induced). Changed me forever, so I can understand the fascination.
My other 2 big movie events of the 70s was
Earthquake with "Sens-O-round". lol! My local theatre actually installed all of these vibrating gadgets to every seat in the theatre, it was a big deal back then.
And the other was
Jaws. To this day it's one of my all-time favorites. I grew up on Long Island and everyone thought the movie took place on L.I.
It didn't but had many references to L.I. like "Amity" instead of
Amityville. In fact, the character Quint was based on a Montauk fisherman. I proudly wore my JAWS T-shirt throughout H.S.
A great film and still holds up today.