^I think that's one strong placebo that you drank (for Pink Pigeon). There's no reason that cranberry juice would abort a trip, unless you convince yourself it will. I think eating food just reminds you that you're alive and well enough to eat, so you start to think properly. I must say, I once got a frightened phone call from a mate on acid, begging me to help him, because he thought he was going to die. I made him some toast and a brew, and told him that acid couldn't kill him, and he just snapped out of it. The mind is a powerful thing.
I've had plenty of success with benzos (mainly diazepam and alprazolam) for getting to sleep after stimulants, even when they're still affecting me quite strongly. When I do that, however, I'll generally wake up still wired, after a few hours. If you take enough, you'll sleep. A few beers will definitely help, but, as always, be careful mixing alcohol and benzos.
As for trips, benzos may well get you to sleep, if you're nearing the tail end of the trip. If not, GHB/GBL will definitely knock you clean out, but you'll likely wake up still tripping slightly, after a few hours.
