Brain shit in general. Concussions will do this too. I had a really bad concussion a few years ago that required hospitalization including jumbled words, super weird. In a couple months I was holding a knife to my throat yelling at my partner "I'll fucking do it, just the jugular. Five seconds and it's over!" I was in a full psych program that night.

The sheer sense of doom and depression after any kind of brain trauma can be uncontrollable and overwhelming and completely out of character for the sufferer. I can't believe that people want someone in politics to not do something about that.