Especially how you keep repeatedly dying because Katherine can't run in a straight line. I beat it by luck the first time and now went back to get the gold on it (got gold in all the other levels so why not?) but just can't do it because Katherine can't climb that last set of stairs before she falls off the bottom.
Who spends way too much time trying to get gold trophies on every nightmare. Last night I spent over an hour trying to perfect my runthrough of 5-2. So far about 7.5 hours into the game and have 5 gold trophies on normal.
Does anyone else out there care about the trophies or is it just me?