Symptoms include being addicted to Pain Pills from an unknown company, knowing how to use a gun when you pick one up for the first time, being constantly attacked by zombiemans, looking like the guy in my avatar, and loving this song.
http://www.youtube.com/watch?v=TkVT2NwiAgY&feature=related (http://www.youtube.com/watch?v=TkVT2NwiAgY&feature=related)