Thinking out it, I once got close. I broke my finger on the swings once when I was out camping. It was the most excruciating pain I've ever had to injure. I wasn't able to move my whole arm. Walking back over to my car, (I was visiting the park before we left. It was my family's last day there) I started to feel extremely dizzy and n*. My head was spinning. I ended up having to sit on the side of the parking lot as I awaited some ice. During which I almost passed out and or v* at least twice. Got back to the city and didn't go to the doctors. I now have a semi bent finger.... So to answer, yes. If I get into an incident where I get injured enough to v* my body would want me to pass out cold.