I've never fainted but once in my fourth grade class we were presenting our state projects and this annoying little freakish kid(nothing to do with it) walks up to do his and he fainted.No one knew it because it looked like he was picking something up and hit his head on the little rim for markers on the board. The teacher called the nurse and they made him sit in the back of the class with his head between his knees and he didn't even get to go home.