Craziness with JS objects and arrays

gistfile1.txt

// Without running the code in the console, can you tell what this will do?

var superBlinders = [ ["Firestorm", 4000], ["Solar Death Ray", 6000], ["Supernova", 12000] ];
var lighthouseRock = {
  gateClosed: true,
  weaponBulbs: superBlinders,
  capacity: 30,
  secretPassageTo: "Underwater Outpost",
  numRangers: 3,
  ranger1: {name: "Nick Walsh", skillz: "magnification burn", station: 2},
  ranger2: {name: "Drew Barontini", skillz: "uppercut launch", station: 3},
  ranger3: {name: "Christine Wong", skillz: "bomb defusing", station: 1}
};

function dontPanic(location) {
  var list = "";
  for (var i = 1; i < location.numRangers; i++) {
    list += location["ranger" + i].name + ", man the " + location.weaponBulbs[location["ranger" + i].station - 1][0] + "!\n";
  }
  alert("Avast, me hearties!\n" +
        "There be Pirates nearby! Stations!\n" + list);
}

dontPanic(lighthouseRock);