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Post Traumatic Stress Disorder. It's a fancy way of saying "Hi, I lost my parents, my planet, and my brother, and I kind of lost my cool for a little while because of that."
Look. I'm not trying to dredge up bad feels. Restitution won't be enough. They'll want a reason and a way to prove that, based on that reason, you won't be doing that ever again. And trust me. Flip-side You? You know, the one that said he wanted a Bloody Mary during an Avengers meeting?
That's what PTSD does to people. It messes you up for a while. Or for a really long time.
It's entirely normal to feel that way too. Lots of people on Earth have it. Hell, I have it. I woke up in a cave with a car battery hooked up to my chest, thanks to some terrorists. It messes you up on the inside. Not just the outside.