I can relate to those shots on the finger nails, taken a few to the lip and they are not as bad.
My screen-name on the SD Forums is HeatStroke for a reason. Suffered it badly only my second time to an outdoor game. I was geared and ready to go at 8:45 am for the 9 am start, however "game on" wasn't called until 11 am and at 11:01 I was on my back and out.
Having to lie on your back for four hours when you intended a full day of fun, really sucks besides heat exhaustion makes you feel "poopy" for the lack of a better word.