Earlier quoted context omitted.
The only reason your awareness seems to be inside of your head is because your head and face is your primary interface with the world, where the core of your senses reside and is, therefore, your default state. You can test this hypothesis by practicing a meditation technique called "body scanning" where you allow your awareness to focus into various parts of the body, leaving your head and indeed entering your hand…
I doubt that meditation techniques would allow you to stay conscious after something destroys your brain.
EDIT: to be clear, I'm arguing that the perceived location of your "self" is just that - a perceived location. An arbitrary frame of reference that defaults to one's head, but can be moved around. I.e. something worthless as evidence for panpsychism.