you start hearing in-game sounds. I was just reading a weblog when I noticed that I heard the sound effect of a person shooting a blaster from Tribes 2. Its a weird feeling for sure. Whats worse is when you interact with real life like it was a game. IE, think about jumping over a person and fragging them at the same time, if they say something you dont like. I havent gotten to this stage quite yet. What are your experiences?