Doffy90 -- I've played both games, and I don't remember anything jumping in front of the screen, though I can't say that I remember every moment of both games.
Still, there are a few gruesome sights, and moments of psychological horror, particularly in the second game.
Have you played the most recent Last Half of Darkness game? I'd say that the Darkness Within games have significantly less of the "startle" scares than in Last Half of Darkness.