Board Thread:Off Topic/@comment-26397825-20160528034745/@comment-27450328-20160601143417

Well it is possible for people to faint when confronted to intense emotions, it is not a TV thing :

“One common scenario is where someone may faint after hearing terrible or over-joyous news,” explains Dr. Lai-Becker. “For example, some people faint at the point when we pronounce a loved one dead. It occurs when something comes over someone, emotionally and psychologically, and it’s too much to process.”  Fainting due to emotion, or psychogenic syncope, is even more common for individuals with anxiety, hysteria, panic, or major depressive disorders. With that said, Dr. Lai-Becker points out: “Many physicians wouldn’t agree these scenarios are simply a result of overwhelming emotion, but rather a combination of factors.” These other reasons may include anything from low blood pressure to hyperventilation brought on by extreme stress or anxiety. (source here)

For the "fight or flight" approach, some individuals may fight, but only after a small moment (a few seconds). And their fighting skills would be less efficient than normal ones. That would stick pretty well with the idea of the "weakening battle cry" that is the second tiers.