Just for fun I've tried a script over the Alexa top 1M sites...

Strangest thing:

  www.vg.no

  X-VG-WebServer: leon
  X-VG-WebCache: dexter
  X-Rick-Would-Never: Know the Rules, and So Do I
  X-VG-Korken: http://www.youtube.com/watch?v=Fcj8CnD5188