Build a solid base in the bunker and stop moving your legs
The instructor points out that the biggest fault he sees in bunker play is players moving around too much with their legs. Will played with no side-to-side movement; that really solid base and platform is what let him rotate and turn through the shot with some pace.
Channel: Dan Grieve
Watch official source at 14:50Why this context matters
Said while breaking down Will's bunker setup and swing in the challenge.