I was watching a show about Randy Cunningham in Vietnam. He said he didn't get cold or scarred while flying but operated on his training and knowledge instead. He did say that when it was all over and you sit alone that all of a sudden the emotions that you were ignoring all of a sudden come back, and sitting by yourself crying, sweating, and shaking were not uncommon. His backseater Willy Driscoll said that that the pressure during a dogfight was so intense that people would physiologically break down and urinate, vomit, and defecate on themselves, and still have to fly the mission, sounds somewhat similiar to the effects founds on infantryman during WW1 when war become so mechanized. Though in the air the effects are pretty much the same.