[dlam]

http://speedcathollydale.files.wordp...lbis-swing.jpg


Here's a swing sequence of a known bobber.

Natalie's cervical spine and left scapula stays very level despite lowering the top of her head.
Use the red flag in the driving range as a stationary reference point.
She does move her head up and down during the swing but the overall integrity of her upper spine and left shoulder remains level.