Feel pressure into the lead foot to bump the lead hip
Feel a bit of pressure move into the lead foot and move into the lead hip to create separation from the lower half. You do not need to drop down much; for many golfers that is disruptive, so keep the feel to pressure moving into the lead side.
Channel: CraigHansonGolf
Watch official source at 2:27Why this context matters
Hanson references what McIlroy does at the top of the swing while describing the feel.