-Like Wolfdemon59 said: the Sega scream, I still make it to this day.
-Cheats that make no sense, I think it was one of the Age of Empires games, possibly the first one that had PepperoniPizza as a cheat, ok, now I think of it it may have been for food, not that unrelated...
-Playing the demo if Half Life and being scared out of my wits by the head crabs in the training level... Still hate them.
-Watching my mate play Silent Hill, in the middle of the night, then walking home, alone, in the dark...
Edit:
-Seeing Oblivion for the first time (I hadn't been exposed to the Elder Scrolls before this) and thinking 'I have to own this'
-Cheats that make no sense, I think it was one of the Age of Empires games, possibly the first one that had PepperoniPizza as a cheat, ok, now I think of it it may have been for food, not that unrelated...
-Playing the demo if Half Life and being scared out of my wits by the head crabs in the training level... Still hate them.
-Watching my mate play Silent Hill, in the middle of the night, then walking home, alone, in the dark...
Edit:
-Seeing Oblivion for the first time (I hadn't been exposed to the Elder Scrolls before this) and thinking 'I have to own this'