I think you just get very, very scared, and that is how your body "turns itself off"
due to the fear. The fainting is your body's way of resetting itself, it seems.
I hope you don't get hurt too often!!
I have done that before. It is kind of like a shock. Cutting veggies one time I thought I took the finger off, and I laid down as I felt the faint coming on. I woke up and then checked my finger. It was ok. I haven't had it happen in years. You are not alone on that.
