"It's not uncommon for people who've been through something frightening, or painful, to not completely deal with it at the time," Susan explained carefully. "It's a way the mind has of getting you through a bad experience, in order to let you survive it. To think about it in pieces, a little at a time." Not the best explanation, but she didn't want to strain the language barrier as well as Nadia's psychiatric understanding. "So it feels like it's happening, still happening to you, later. In my time, they called it shell-shock. It's most common in soldiers. An accumulation of experiences that haven't been fully realized show up in other ways." After a moment, she asked, "Do you understand?"