I agree with my husband, and I know from my work that shaking is a normal human response. Perhaps what is "abnormal" (hate to use that word) about it in people with PTSD is the cause of the shakes, their frequency and severity. But at the core, shakes are as normal as say, the startle response. Everyone has the startle response, people with PTSD just have it more often and more severely. In any event, I voted yes to both kinds of shakes, I have had them occasionally when frightened, angry, and very sad as well.