'The LEGO Ninjago Movie' stars Jackie Chan and Olivia Munn use the power of Twitter to answer some common martial arts questions. Jackie also teaches Olivia how to karate chop some pieces of wood and defend herself from knife attacks.br br Still haven’t subscribed to WIRED on YouTube? ►► br br CONNECT WITH WIRED br Web: br Twitter: br Facebook: br Pinterest: br Google+: br Instagram: br Tumblr: br br Want even more? Subscribe to The Scene: br br ABOUT WIRED br WIRED is where tomorrow is realized. Through thought-provoking stories and videos, WIRED explores the future of business, innovation, and culture.