Head Stillness- What does it Feel Like?

 
Too much noggin movement is a common malady that afflicts many a golfer. If
Doc McStuffins was a swing coach, she’d diagnose the patient with bobblehead-itis.   Like Blink 182 instructs in “All the Small Things,” keep your head still.
 
But how do you practice that stillness? Sure, you could have someone grab your hair so you’ll be able to feel any swivel or sway action.  That’s what Jack Grout apparently did for his pupil Jack Nicklaus, though it turns out that legendary story might be a tall tale.
 
A training aid making serious headway in this space is The Headstill a contraption with an adjustable boom that you keep against your head so you can get a tactile sensation of what it feels like to keep your head still while your rotating through your swing.