How to transform a Shakespeare soliloquy from a gorgeous ballad of love and loss into the chilling stuff of nightmares: Whisper it Play it backwardBioShock Infinite features hidden dialogue in its Possession Vigor, both in the scene where players first encounter the stuff, and when it's used to possess enemies. It's a line from Romeo and Juliet, played backward and whispered: "Come, gentle night, come, loving, black-brow'd [night] / Give me my Romeo; and, when he shall die / Take him and cut him out in little stars."