I used to work as an orderly in the X-Ray dept at a city hospital and what you describe sounds a lot like barium in solution, used as a contrast material. They give it fruity flavors, but it doesn't hide its hideous texture. I don't know why you would be required to drink it 3 times a day. That part doesn't make sense.
As to Air Force training -- try jungle training in Panama for two weeks. No sleep, little food, constantly moving around in 100 degree weather with
near 100 percent humidity. You often feel like you're gonna suffocate, not to mention the aggravated case of crotch rot, your feet always being wet
and sore and a constant barrage of insects and other indigenous jungle life forms trying to enter your body through every orifice.
[edit on 25-3-2009 by Smack]