If you've ever played one of the games from the Metroid franchise you probably wondered how Samus Aran's arm cannon works considering it covers her entire arm and doesn't need to be reloaded.
Playing through all the games didn't provide any answers to this question, but then I came across this Awkward Zombie comic by Katie Tiedrich and the answer was made clear- Samus' guns power the cannon! What a physique!
(So then...are the missiles her fingers?)
-Via Geeks Are Sexy