Yep, and generalizations—lots of generalizations. Shrinks and social workers like to lump the feeble minded in with those who’ve had inner ear injuries from percussions and/or field exhaustion (exhaustion that most civilians never know—hard labor with virtually no sleep for weeks).
[I was only National Guard, BTW, with no hardship tours. But I was combat (combat).]
Oh...heh, heh. Want that “thousand yard stare?” Live outdoors for at least a week or about a month to be sure. Don’t go in any building, tent or vehicle at all during the whole time. Keep very busy for at least 20-23 hours a day. No TV, no radios, no Internet gadgets, no colorful clothing or colorful anything in sight—only “earth” colors allowed. Voila: bush fever, thousand yard stare.