Swing works in sequence or you go over the top
The speaker stresses that the golf swing uses both sides of the body engaged in sequence, with sequence as the key word. He notes that if you are out of sequence at the top, the wrong part of the body rotates, which makes you come over the top.
Channel: Todd Graves
Watch official source at 1:10Why this context matters
Framed as the answer to whether the swing is lead-side or trail-side dominant.