"How to run on anger and win your first 100km trail race" could be the unexpected title. Carole is talking to Eric Böhm the founder of the effortless running method about their first ultra-trail running race. The North Face 100 Asia Pacific series. A gruelling 100km in the heat of Thailand. How the two long ironman triathletes prepared and survived the new challenge. How do you control negatives emotions when the unexpected happens during a race? How to keep going in the dark side? We can learn how to use obstacles to push ourselves to the finish line. Physical limits and mental limits are fascinating borders.