Sounds scary to have her pass out like that, probably freaked them out in the store!
Last year I almost had it happen at the Blayney Hotsprings, it had been a very hot day dropping down to that altitude and i'm sure I didn't drink enough then I sit in the hotspring for an hour with no water and I get out to walk over to the little lake near by and it took all my energy to walk the 100 feet to it and I started feeling dizzy so I closed my eyes trying as hard as I could to fight it and then I had to sit down and slowly I brought myself back but it was close!
I guess you have to learn yourself like twice I was going into shock over small wounds because I learned I was dwelling too much on it, like once at work I just cut my finger bad and I was all pissed and kept thinking about how much it sucked and how annoyed I was and I began to get dizzy and sweat horribly and my ears began ringing and I almost passed out. Had it happen another time also when I stabbed a power drill through my finger and smashed the bone on my finger tip, had a piece of bone on my drill tip lol.
But anyway as for flashes I really wish the 5Dmark2 had a flip up flash but it doesn't, no built in flash at all so your stuck with pulling out some big thing and putting it on.
Sadly I am stuck with white balance with these images because I shoot in JPG on really long trips because I don't have enough memory, normally I always shoot in raw but I get about 550 shots for a 16gig card and I only have 3 16 gig cards and even with JPG that just gets me through on a summer hike.
We just have to keep looking forward to the day digital becomes way better than film ever was, it will happen some day!
Perhaps the shutter could be scaled down to about 50 shutters and sensors to take every bit of the frame in the perfect balance of lighting to get rid of this "do I want over exposed sky or under exposed foreground?"
