Discipline the mind. Mystery requires it to be a contest. Will he, won't he, will she, won't she. Find out when to extend moments, it could go either way. Don't hurry, explore every possible moment.
Good guys going to win, bad guys going to win, stretch the rubber band.
Never got past being a scene. Everything seems planned. Mystery can be more than suspense, here it is. Main essence of story. The story efficient.