Magic mushrooms are now being used to treat anxiety. Just something to consider when dealing with a situation that creates massive amounts of anxiety (being stuck in ice with no way out).
I am really not sure I'd want to be stuck in ice, ON ACID, with no way out :)
…though I think your point is, that while you're stuck in ice with no way out, all the mental stability structures you build to connect yourself to reality are bad and harmful. And being on drugs and disrupting your reality, breaking down your preconceptions etc. would be more along the lines of continually breaking down the BAD mental structures you're inevitably building, due to correct appraisal of your situation.
