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Did you know that if you stand up straight and lock your knees you can pass out, and fall down? Some third through fifth grade students learned that first hand at rehearsal today. The music director specifically warned them. It happened anyway. A young man did just that and fell face forward to the stage and knocked himself out. He broke a tooth, and his glasses. Yes, 911 was called. He was taken in and examined, then off to the dentist to fix his tooth. The adults handled everything well. We have a retired nurse who works as a para and she was there. The principal was there. No one really panicked. The kids sat and watched. The young man regained consciousness. His neck was stabilized and he was transported about four blocks to the ER. I have known of other kids who have done this. It is a hazard one does not often think of, even when they have been warned. This was the first time I have been present when it happened. __________________________________________________Edited information: I researched a little and learned a lot of different opinions. One of which is that standing still too long causes a reaction in the vagus nerve which can result in syncope. Another opinion says that fainting may happen anyway, but with knees locked you fall straight over, hitting your head or face and causing more injury. With your knees relaxed you will slump straight down and not fall so hard. Third point I gleaned was that standing very still too long causes blood to pool in your legs and then you get dizzy and may faint from lack of blood flow to the brain. One more reason I read is that stress and dehydration contribute to this fairly common phenomenon.