Horse

This rather opaque code snippet:

javascript: setInterval(function(){
  function d(e) {
    var c = e.childNodes;
    for(var i = 0; i < c.length; i++) {
      if (c[i].nodeType == 3) {
        c[i].nodeValue = c[i].nodeValue.replace(/[^\s]+/g, "HORSE");
      } else if (c[i].nodeType == 1 && c[i].tagName == "IMG") {
        var cs = window.getComputedStyle(c[i]);
        var x = cs.width, y = cs.height;
        c[i].src = "http://bit.ly/vcrd56";
        c[i].style.width = x;
        c[i].style.height = y;
      } else if (c[i].nodeType == 1 && c[i].tagName == "I") {
        c[i].style.backgroundImage = "url('http://bit.ly/vcrd56')";
      } else {
        d(c[i]);
      }
    }
  }
  d(document.body);
}, 1000);

when pasted into the address bar on Facebook, achieves something beautiful:

I offer no justification for this script, but thank my cousin Tom for the inspiration.