[blobwalker]

In a situation like that where you're in pain and anxious to start with, and are not prepared for what's going to happen, I can imagine it would be pretty horrible. I was in a comfortable situation and well-prepared when I got my first IV, and there were still a couple of brief, scary moments in the experience. And as someone else said, you probably got a much bigger dose, putting you deep into k-hole territory, if not actually knocking you out. When used for therapy, that kind of dose is usually reserved for those with chronic pain or other conditions, not depression or suicidal ideation.