Do you ever experience a game in wich you were so focused on that you lost sense of the outside world? (like a videogame Stendhal Syndrome?) It happends to me with Silent Hill 2. I used to play it with headphones in the dark, when I put down the joystick I could still feel the game´s atmosphere and was really jumpy even about little noises...it was like being inside that freakin town, I loved that feeling) It never happend again, not even with silent hill 3 or 4.
Did something like that happend to you?