Peter McCarthy was randomly attacked on a night out in Galway City (Ireland), leaving him badly scarred and threatening the vision in his left eye. On his recovery Peter came across an article on Muay Thai boxing in a newspaper and decided to leave Ireland for Thailand and learn how to defend himself. Fight or Flight documents a journey over several years in Thailand as he goes from a novice in Muay Thai to fighting in semi-professional bouts in arenas full to capacity crowd. Through the course of his experiences in Muay Thai, he learns that behind his compulsion to fight lies fear and ultimately a deep-seated anger that has driven him to risk his body in the ring.

Fight or Flight is a compelling first person account of a journey of coming to terms with the anger within oneself. Fight or Flight began in Chiang Mai, Northern Thailand and has taken over five years to produce. The film has been described as "Something altogether different and deeply compelling". Winning multiple awards including "Best Foreign Documentary" at the the prestigous Long Island Film Festival, New York. Hailed as one of the most psychologically in-depth movies in its genre, Fight or Flight is a "one of a kind” film that uses human violence as a platform for a deep, and at times disturbing, story.