Konami Code!

konamicode.js

var kkeys = [], konami = "38,38,40,40,37,39,37,39,66,65";

$(document).keydown(function(e) {

  kkeys.push( e.keyCode );

  if ( kkeys.toString().indexOf( konami ) >= 0 ) {

    $(document).unbind('keydown',arguments.callee);

    // do something awesome
    $("body").addClass("konami");

  }

});