For Gone Girl’s memorable sex scene — its climax ending in a pool of blood — Neil Patrick Harris and Rosamund Pike spent a whole afternoon working through the scene with the “exacting” director David Fincher and, at one point, with Ben Affleck looking on. “[Fincher] was asking us to have unbridled sex — and my character is really into her so is very overwhelmed — with great precision,” Harris said. He broke down the scene in a conversation at Vulture Festival, moment to moment: “We were just rehearsing porn for hours.”