I've even seen this happen to people in good shape. The combination of no sleep, low blood sugar, heat, stress from speaking, and then standing for a period of

I've even seen this happen to people in good shape. The combination of no sleep, low blood sugar, heat, stress from speaking, and then standing for a period of time can all add up. Especially if you "lock" you legs while standing, which can lower the blood pressure to the upper body (head). Still, it is wise to visit a doctor ASAP to have your ticker checked. I hope Bill is okay - what an awesome individual!