Over the weekend we watched Grizzly Man. There's a scene in it where we learn via a coroner there was audio of the documentary subject and his girlfriend being attacked, killed, and eaten by a bear. One of the subject's ex-girlfriends has the video camera with the tape the audio was on. She allowed Herzog to listen to it.
They didn't play it for we, the viewers, at home. He didn't play it to her for a reaction (she admitted she'd never listened to it). Instead he told her to never listen to it and destroy it, or else it'd be a white elephant that'd haunt her for the rest of her life.