From what I've read, day and a half to pass a test, 3 days totally out of your system. Everything but weed has that timeline. Water soluble vs. Fat soluble.

Cuckoo's Nest is one of the few times where I'd say the movie is as good as the book.

I think Charlie is trying to get fired, so he can try to get paid off on his contract. He doesn't want to quit, because then he'll be the reason a couple hundred people are out of work. I won't buy he's legit loony until there is a cry for help suicide attempt, ala Artie Lange.