This story is part of True/False Conversations, a series of in-depth interviews with the filmmakers of this year's True/False Film Fest. Find the rest of them here or download the podcast on iTunes. When David Farrier, a journalist from New Zealand, came across videos of competitive endurance tickling online, he thought he had found one of the most unique sports out there. But when he tried to reach out and learn more about the sport, he was met with an alarming amount hostility.