Story short: While stationed in Darmstadt Germany I was working on the back of a 5 ton late in 1984. I was attempting to repair a pump unit to keep the unit from the Dead line report. I was using a 22 inch cresent wrench and pulling with al my might and when the part finally moved the wrench sliped off and threw me backwards off the truck striking head and shoulder on the truck next to me and then falling to the ground. Not knowing or even realizing what happened I have been thru hell over the last 25 years. With: night sweats, migraines, anger, mood swings, lack of sleep, no sleep, never finishing projects, taking it out on the familly and friends. Is it PTSD? I don't know my gut says something is wrong. So now I seek answers?