Clip of quote: Keep those knees rigid. Jerk that lower back. Clip of quote: Keep those knees rigid. Jerk that lower back. Yarn is the best way to find video clips by quote. Find the exact moment in a TV show, movie, or music video you want to share. Easily move forward or backward to get to the perfect spot. It's available on the web and also on Android and iOS.
Keep those knees rigid. Jerk that lower back.
Image of Keep those knees rigid. Jerk that lower back.
Keep those knees rigid. Jerk that lower back.
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