Picking a Pony

"I call it pick a pony. I don't even know where it came out of my mouth one day," he said. "It can get very complicated when it's a true story because people will start to say all these things did happen, well, how do I use this thing that happened? So you really have to pick a pony." He added: "If you cannot throw any tone in that you want, if you can’t shift main characters in the middle of your movie, then you have a bazillion relationships for me to follow"