I got the idea for this from a drawn picture I saw, so credits for the idea go to whoever made the picture: http://www.cubeupload.com/files/b49c007213801521275214.jpg
Proposed uses: Prevent backstabbing by presenting an alert to spies even with one's back turned Adopt a psychologically alarming disguise by wearing over one's face Great for children's parties.
Installation instructions: 1. Select which hat would you like the mask to replace 2. Go into the folder of the selected hat, take the materials and models folders and put them in your Steam\steamapps\username\team fortress 2\tf folder, overwriting the existing folders