From the first minutes of Murder House through the latest episode of Freak Show, American Horror Story is responsible for countless nightmares thanks to its weekly doses of disturbing moments. Co-creators Ryan Murphy and Brad Falchuk (and their writers) consistently outdo themselves when it comes to grisly killings, brutal sex scenes, and creepy characters, campily intermingling supernatural tropes with terrors that are grounded in reality. Here are Ahs's craziest, most distressing scenes. (Spoilers follow, obviously.) 39. Lana Revisits Briarcliff (Asylum)Lana's (Sarah Paulson) exposé on the her former home sees her go back to the horribly understaffed asylum with a camera crew. Their footage — lo-fi, grainy film stock — underscores the creepy, sad images of feces-covered inmates living in almost total darkness. The footage is a veritable remake of Geraldo Rivera's Peabody-winning report about a Staten Island hospital, Willowbrook: The Last Great Disgrace, which can be partially seen in the...