[ChrisNZ]

Could it not be a hit with a horizontal hinge/sequenced release?

That said, there seems to be centrifugal force in this swing. Having tried it (and liked it!) after viewing the video, it seems that while accumulator 2 is released non-automatically from the top, accumulator 3 is released automatically (in sequence, once 2 is almost all gone). It felt to me like force was generated from the top quite quickly, and then as the roll kicked in automatically, and the clubhead was thrown out, the body picked up the rhythm and turned through with the club - to me it felt like pivot power at this point, but it is probably more just a motion, as it didn't feel like there was any dragging involved. Once acc. 3/centrifugal force kicked in, it just felt like holding on.

It certainly seems like a simple motion - it made me smile

Whip it and zip it,
Chris