The sudden death of Thai martial arts legend Panna Rittikrai, the action choreographer behind Tony Jaa’s moves in Ong-Bak, left his last movie, Vengence of an Assassin, unfinished. But thanks to his son, Kitsana “Tong” Ladphanna, 24, and leading stuntman Nantawut “Wut” Boonrubsub, 21, it has finally reached Thai cinemas. Here, they discuss how genuine martial arts talent will always bring more drama to the screen than CGI and guns.