[url=http://tvtropes.org/pmwiki/pmwiki.php/Main/ImmortalityHurts]Very undead.[/url]

Keep in mind, it at the very least implies a fatal injury, and continuing for eternity with that pain as people shoot at you for fear of their lives.

A soldier can, in some instances, blow your head off... you'd still feel it. Forever.

Or, you could become a zombie-head on a stick.