That's correct - the right shoulder does move, but it does not spin and that's the big difference between Hitting and Swinging. It moves because the right triceps pushes both the left shoulder and left arm, which are inert. If the right shoulder acts as a backstop and the left arm and shoulder are inert, just how else could the left arm/shoulder be driven out?
Yes it can, but only when Swinging or 4-barrel Hitting.
Not so far, because you don't have anything to Hit against!
Homer doesn't seem to be saying that to me, because it wouldn't make sense.
If the moderator will allow us to move this to my "Learning and ...with a disability, " that might make sense.
ICT
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HP, grant me the serenity to accept what I cannot change, the courage to change what I can, and the wisdom to know the difference. Progress and not perfection is the goal every day!