Schoenberg’s A Survivor from Warsaw
Whatever you do, don’t fall asleep while listening to some Debussy followed by Schoenberg’s A Survivor from Warsaw. The Debussy will lull you into a peaceful, somnolent state. Then A Survivor from Warsaw will come on and it…will…scare…the…living…hell…out…of…you. (But I guess that’s sort of the point of it, isn’t it?) I learned this from personal experience.