Life-Size Portal Turret Can't Shoot, but Looks Cool

I am a a big fan of video games and if you have ever played the game Portal, you will recognize this DIY creation right away. The builder handcrafted the turret and it took about a month to build. It has motion detection, a laser pointer, and when it senses motion it plays the sound of bullets firing. It even has a button that plays the Portal theme song. I hope the next version incorporates NERF guns or Airsoft so the turret can really shoot. link