Soldiers who had been exposed to the horrors of trench warfare, the constant threat of death, who had seen their brothers in-arms wounded and killed while they themselves were unable to do anything about it, would shout and cry hysterically, or become suddenly rigid. Their personalities changed; they became silent and unresponsive. Some even lost their memories or their senses.
當軍人長期暴露於壕溝戰中、或受到死亡的持續威脅、目睹同志傷殘與死亡而救援無望，堅強的男性戰士也會歇斯底里地尖叫痛哭，或者瞬間僵直無法動彈，性格變得沈默而反應遲鈍，最終喪失記憶與感覺能力等。