I'm having one next week for some dental surgery and I'll only be out for 45 minutes, but I'm really nervous.
I'm also a little bit concerned about when you actually fall asleep. It says on the info they have sent me that I will be given an injection to make me feel sleepy and then I will be taken to theatre and given the actual anaesthetic. I assumed the first injection was the pre-med, but then I read that you have to ask for that.
Naturally, I've been googling and reading horror stories, and now I can't think about anything else.