"Oh. Sorry. Its an acronym that stands for Post-Traumatic Stress Disorder," Sam explained. He hadn't realized that even the acronym might be foreign to someone. It was common in his time though, so sometimes he still forgot that not everyone was coming from a similar background.

"Guess I could have started with that," he considered the term Credence used and nodded, "I think shellshock eventually evolved into that term. They wanted a term that could describe trauma that might occur outside of the war I guess. Since there are people out there who suffer from other types of stress and trauma besides just war." He remembered learning about that in one of his college classes -- though at the moment he couldn't exactly remember when shellshock turned into the catch-all term of PTSD.