[comdpa]

I have looked at his motion many times and could not discern whether it was hitting or swinging. I have always leaned towards swinging. It appears he uses horizontal hinging in his follow through. Or could he be swinging using an angled hinge. A swinger could assemble at the top also. I am still not sure. What else makes you think he is hitting, has he ever made a comment that he pushes? Sometimes it is hard to tell.

In the fifth frame of the sequence it is readily apparent that his elbow is in a "down and at the side" position.

Yes, hinge action does not differentiate between hitting and swinging (10-19-0.

In frame 2 Backstroke 8-5, the face is in an angled hinge position.

In frame 4 Top 8-6, it is clear that angled hinging is employed.

Again, at Followthrough 8-11, one can see the angled hinge that is employed.

Also he is using a single wrist action per 10-18-C. The left wrist cocks due to the bending of the right elbow per 7-3, but there is no independent turning of the left wrist to the face of the plane as a true swinger would employ with his standard wrist action of 10-18-A and 4-D-0.