[Yoda]

Yoda, if you supinate the left wrist the arch occurs. Mr. Hogan knew that
which was why he called the action supintion and showed the left wrist
turning over.

SuperDave,

As we've seen, using a term that defines a rotational hand motion to
describe a horizontal wrist motion is simply wrong. However,
that's no skin off my green nose; and if you prefer to define the Arched
Left Wrist at Impact as Supination (palm up) that's fine by me. But, I
am curious:

Just what term do you use when the Left Wrist has Pronated (palm down)
during the Backstroke and is Arched at the Top? Is this Arched
Wrist still 'supinated?' Can a Wrist pronate and supinate
at the same time?

Oh me, SuperDave, I guess in your world, probably so. Because...

"To a man with a hammer, everything looks like a nail."