During the now long-forgotten public meltdown in reaction to Darth Vader's added dialogue on the blu-ray release of ROTJ, I noticed another chunk of audio in the same scene that was far more mystifying. Since then I haven't seen it brought up anywhere else, and I figured now might be as good a time as any to point it out. During the top-down shot of Sidious as he's hoisted into the air by Vader, it's sounds (to me, anyway) as if he's yelling 'ANAKIN!' or at least 'ANAKAAA!'. Go and check for yourself. There's something syllabic buried in there. Since the name Anakin is spoken several other times throughout ROTJ, it isn't entirely implausible that Sidious refers to his apprentice by his original name in the instant of his betrayal. Hidden dialogue or audio pareidolia? Either way, I haven't been able to 'unhear' it in nearly two years. I don't know. Maybe I'm just going crazy.