User blog comment:Vorknkx/Quake - expectations vs. reality/@comment-3547390-20150417103131/@comment-1496755-20150417103443

Ha, same here - I didn't know the CD had music on it until I accidentally forgot it in the drive once.

Yeah, I suppose I opened up the menu quickly and thus didn't see what was going on in the demo. Besides, I must have been eager to start playing! When I reached E1M3 for the first time I kept trying to kill Zombies with the Shotgun or Nailgun. Obviously, this failed, so I concluded they were "indestructible". (sigh)