What are your experiences with fainting?

What sensations did you experience prior to fainting? What were the circumstances that caused you to faint?

FYI, this has little to do with my well-being. I'm just curious.

the first time I fainted was because of blood loss and I was hot and then the room started to go dark slowly. The second time I fainted was because I was sleep deprived and got up too quick, I didn't feel anything but remember a loud bang when my head hit the floor

Never fainted.
My cousin fainted because she was anemic, though.

*** i've never had the experience of fainting. always thought it sounded kinda cool...except for the falling and smackin my head part.

Well it's hard to explain but here goes,

My body feels very tingly and my ears ring, I see colored lights (very bright). Then I'm done. Circumstances well I'm not sure different situations. Once I had painted with Kilz Paint.
Another time I had the flu. One time I got overheated. After I wake-up I get the dry heaves. weird.

ok wow well i have fainted 5 times in my life. i am 15 years old.
first time was when i cut my hand and i guess i lost too much blood and passed out in my church bathroom. i did not feel a thing except for calmness.
the second time was after taking too much diet pills. i first felt cold then hot then like i was guna throw up. except i didnt eat anything.
the third and fourth time was after i had a blood test at the doctors and i felt like i was really light and like i was dying.
the fifth time was in my health class. my teacher was talking about the woman having a child in her womb and how a miscarige can happen and how the baby can fall out just after 5 months and i just got really grossed out because my teacher was being sooo descriptive and then i started feelin really sick like i was guna throw up(but i didnt eat anything) then i felt really hot then cold and then i was so hot that i could not move. then i told my teacher that i felt sick and i guess he knew what was coming and he took me outside and i just collapsed

When I was 13 I took on a guy inboxing that was 50 lbs heavier than me. I was jabbing away thinking he was too slow. I saw an opening in his stance and I went for a long hard right hook for a knock out. His left uppercut hit my jaw first, lights out and I woke up 30 seconds later on the floor.

My blood sugar drops, or I get over heated.