what is the condition of the left wrist in a flip release?
The left wrist is flat through impact.
The flip release is probably the most commonly practiced release in the world. Its simply throwing the hands with the pivot. Any potential arm swing participation is overwhelmed by the shoulder throw against the #4 accumulator. There is no non-automatic version of this release. Because it is an Automatic swinging procedure (6-R-0) the hands do not manipulate the clubface at all. This release will "flip" the Clubface around and into the ball.
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