Just on the subject of feeling/not feeling stuff when out of it on drugs/drink, in hospital in the early 70's a late middle age guy was brought in. He had apparently been p****d out of his brain and fell asleep next to an open fire at home. When he woke up most of his leg had burned away. Unfortunately I caught a glimpse of it and it's a sight I'll never forget. Don't make 'em like that anymore!