'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.

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Jackie Chan & Olivia Munn Answer Martial Arts Questions From Twitter | Tech Support | WIRED

Jackie Chan and Olivia Munn, stars of THE LEGO NINJAGO MOVIE