Chad Stahelski. Producer: John Wick: Kapitel 4. He came from a kick-boxing background; he entered the film field as a stunt performer at the age of 24. Before that, he worked as an instructor at the Inosanto Martial Arts Academy in California, teaching Jeet Kune Do/Jun Fan. After doing numerous roles in low budget martial art movies like Martial Law III - Tödliches Komplott (1992) and Bloodsport III (1996) his...