It's odd, I can watch almost any horror flick without so much as flinching. Put me in front of a game like DOOM 3 though and start to get really tense if I play for long sessions. When I quit after a play session earlier today my palms were completely sweaty, was kinda funny.
It's not just DOOM 3 though, there are quite a few games that can do it to me. Not *all* games that are supposed to be scary, but the ones that do it, do it well. F.E.A.R. wasn't that bad I didn't think, though there were admittedly a few moments that really made me jump. While I still hold DOOM 3 as the scariest game I've played, the absolute scariest moment ever I think goes to the Shalebridge Cradle level in Thief: Deadly Shadows. I remember starting that level, it was around midnight and everyone else had already gone to bed. 5 or so minutes into the level I turned this sh*t off so that I could try it again the next day when people were up and the sun was out.

Anyone else that gets a bit skeerd by these kinds of games?