Office, The Easter Egg - Extended "Freelove Freeway" Clip on Series 1 DVD

When you've started the DVD and you get to the title menu you see a desk with a phone on it, and the usual play, scene select etc options. If you wait for a few minutes until you hear the phone ring, then select play, you are taken to an extended version of David Brents song "freelove freeway" from the training day episode.