This past friday, our school had a blood drive, and quite a good bit of students gave blood. (I was not one of them) But I heard of several cases in which some of the students fell out, and I wondered, do they actually take so much blood that it can cause a person to fall out, or is it all in their mind? (As Meunouk would say ) Because sometimes if you receive a wound, and start losing blood, you may not lose that much, but if you feel like you're losing too much, you start feeling light-headed and you pass out, but it's not from losing too much blood, it's just all in your mind.