Discover common mistakes that can ruin your badminton smash in this comprehensive 90-minute video tutorial. Learn about excessive pronation, improper turning, incorrect hitting points, and faulty swing techniques. Explore the impact of misusing your left arm, non-vertical swings, and incorrect wrist positioning. Understand the importance of proper grip changes, body rotation timing, and footwork, including the crucial first and second steps. Examine issues like sliding steps, bent arm hits, and side-body shots. Gain insights on grip strength, thumb positioning, and the difference between pushing and hitting actions to improve your smashing technique and overall badminton performance.