Netflix released a special episode of Black Mirror just after Christmas and people can't stop talking about it. The full-length film is an interactive, "choose your own adventure" experience with five possible endings and over a trillion possible permutations of the narrative. If the options are sound overwhelming you're not alone. Being in control of a character can become intense - and viewers have started to meme about the agony and the power of controlling the life of the young programmer Stefan. The memes are fantastic, but please be aware that SPOILERS lie ahead.