Trauma does have its own time zone generally speaking, but "trauma" is a broad concept. There are different types of trauma and plus trauma itself is a very complex phenomena. It sounds like your trauma response is dissociation, since you said you "checked out". Dissociation is one of the post-traumatic symptoms, but not in all cases. Trauma works differently in different people. Unfortunately, it hasn't been researched as much as it needs to be and the overall body of knowledge about trauma among professionals isn't big, and, also unfortunately, they are not exactly honest about the limitations of their knowledge. If you want to learn more about trauma, I suggest you to read "Trauma and Recovery" by Judith Hermann.