Don't watch many zombie movies? A head shot puts them down, the same way windy puts down all opposition... you could fire at a zombie with a machine gun 'til it falls apart and as long as you haven't hit in the head it'll still be alive. Much like... addiction. Safe.
Now that I let the monkeys take over from the goldfish floating around inside my skull for a minute, I just remeber I had really weird nightmares that I hadn't experienced previously or after but only during withdrawal. I don't usually ever remember any of my dreams.