You are not your body. It is just something you wear for a while, because living in the earthplane is infinitely more meaningful and more involved if you are encased in its trappings and subject to its rules.
The biggest surprise for most people in dying is to realize that dying does not end life. Whether darkness or light comes next, or some kind of event, be it positive, negative, or somewhere in between, expected or unexpected, the biggest surprise of all is to realize you are still you.