Have you ever fainted? When I was a child, I fainted quite a few times and I also did as a young adult a couple of times. It's a horrible feeling. In my case, I start feeling very odd and then voices and sounds seem like they're coming from quite far away. Then I feel as if I'm in a tunnel before I pass out.
Luckily, although it took a while, I learned that I can't beat the faint by willing it not to happen. I had to sit down and "assume the position," put my head down between my knees to encourage the blood flow. I also learned that a big part of my problem was my low blood pressure when it was combined with standing for long periods, especially if it was warm. I still can get that feeling starting to come on, but then I get myself out of the situation before I can actually faint.
While fainting itself isn't usually dangerous, how you faint and where you faint is the problem. One time, I woke up right at the top of a set of stairs. I remember feeling like I was going to faint, but I kept on walking. Waking up right at the top of the stairs was a real wake up call (no pun intended). If I had taken another step or two, I could have been seriously injured.
Do you know what to do if someone else feels faint? Here's a quick video that shows you what to do and when you should be worried enough to call 9-1-1. Just click on the TV screen below: