WOW what a powerful film! It's claustrophobic and completely immerses you into what Billy experienced. If you're looking for a solid thrilling film, especially if you love Muay Thai, you need to watch this!
I can't remember a film that has made me think this much since Alejandro Jodorowsky's The Holy Mountain, WOW! Inside Out literally and metaphorically displays every emotion, Joy, Anger, Fear, Disgust, and Sadness. The feels man, the feels.