A countdown special from the Greatest Ever series puts martial arts and combat systems through practical tests to rank which actually works best for real self defense. Wing Chun and Krav Maga both come up for scrutiny alongside other disciplines, with instructors and practitioners demonstrating techniques on camera rather than just describing them. The format works through ten contenders, weighing speed, simplicity, and effectiveness under pressure against tradition and popularity, so a style with centuries of history can still rank below something built specifically for street encounters. Trainers explain the reasoning behind each placement, and the tests aim to separate what looks impressive from what holds up when someone is actually attacked. Rather than crowning a single undisputed champion in the abstract, the episode grounds every claim in a demonstration, letting viewers see the technique fail or succeed before the ranking moves on. It plays like a checklist of how self defense systems are actually evaluated, not just a highlight reel of kicks and throws.