i have a pal who i think lurks here that can chime in on this one since it involves him...
2 friends of mine briefly ran a small recording studio together. one of their clients was this country singer/song writter dude in his 30's. Dude thought he was johnny cash, rollin in there will a pocket full of speed (adderalls). So the 3 of them were snorting adderall and drinking whiskey, and it turned into this 36 hour debacle where after the guy left, my 2 studio pals tweaked the fuck out in post production changing this and adjusting that. I guess the one tried to go home and go to sleep, but ended up just walking 5 miles back to the studio space (because he was drunk too and didn't want to drive), and fucking with it more until he passed out. I'm not sure if i ever heard the final product, but the performer walked away with something, i do know that.
they don't speak highly of the situation when they talk about it, its generally a "i can't believe we did that" in disgust kinda vibe.