Actually, I have when I was younger. I was racing my friend on feet, she is tall with long legs. I guess I just gave it my all in the hot sun and blacked out, falling on my face. I also have blacked out after vaporising. 😛
I almost fainted once on my 18th birthday because I donated blood. I remember hearing a loud ringing in my ears and everything started to become really bright. My mom made me drink fruit juice - the sugar kept me from passing out.
Both in high school. Once the day before an exam. Passed out in the bathroom. XD Spent the night in the hospital and thankfully didn't have to take it. Was in no shape for that!
And once during class. I was feel off and I think I had asked to go to the nurse's office, next thing I know I'm on the floor. Ended up just going home.
When I was in elementary, we had this practice on how to walk on stage. I accidentally fell on the floor, landing on my chin first. I believe I have fainted because I woke up on my pajamas while my dad was watching me sleep. What a nostalgic memoir.