Movie: John Carter of Mars
Most likely, I'd just be a peon in the war. That's OK, the energy weapons are cool. Unless I became one of the 4-armed creatures. I'd probably be thrown in the pit to be eaten by a "white ape."
Book: Proximity: A Novel of the Navy's Elite Bomb Squad
Hoo-YAH! Yes, I would happily take on the role of Navy EOD.