[See, this one he knows, because his sister had repeated them, so Mark would know if he had it. He already knew he had.]

Being easily startled or frightened, especially by things like raised voices or loud noises or things that sound like gunshots. Then there's the always being hyper on guard for danger.

[That one Mark didn't... have as often.]

Um, there's self-destructive behavior. I got into that hard with the drinking. Trouble sleeping, especially if you're having dreams about the trauma. Trouble concentrating too. Overwhelming sense of guilt or shame. And of course, increased irritability, angry outbursts, or aggressive behavior.

Wait, you mean for PTSD right? Because those are specifically for that.