I have, for many years now, wanted to try floating in a sensory deprivation tank. I've read articles on it and even seen movies about how it can put you into an altered state of consciousness. Imagine being in a tank with 10 inches of water with 800-1000 pounds of epsom salts dissolved in it. You get in and you float like a cork. The water covers your ears. You close the tank door and there is no light. You lie in the water and you can't feel your body -- you're nude and suspended. No touch, no sight, no sound, no smells and no taste if you don't allow any salt water to get into your mouth.
I have a flyer for a floatation center in Oakland. There are several in the Sacramento area once we move. One day I WILL experience this opportunity to see what the mind will do where there is no sensory imput. As a beginner in meditation (and doing it everyday without fail - YAY!) I'm interested in how my mind would react under such conditions.
Here's a link to more info on the subject from that Oakland center website.