“Every great magic trick consists of three parts or acts. The first part is called ‘The Pledge’. The magician shows you something ordinary: a deck of cards, a bird or a man. He shows you this object. Perhaps he asks you to inspect it to see if it is indeed real, unaltered, normal. But of course... it…”
— Jonathan Nolan, Christopher Nolan, Cutter, Michael Caine, imdb.com