My thought is she changed her mind way too late and tried to check swing after she had hit it. Or maybe misidentified a change-up and it was gone before she could put on the brakes.Are you saying you know her
Many players are acclimated to doing those drill/swing mechanics. It would be surprising if she had never encountered them.
Mehhh don't think it's introducing something that's a problem. Because it is used so much for training and productivity.
( but that could just be the old discussion of these mechanics over those mechanics)
My wife threw an old sweet potato at me this morning, and midway to me I decided to catch it underhand instead of overhand. But I never actually turned my hand over or dropped my arm, so the potato just ended up on the floor, narrowly avoiding killing our 10lb poodle. Brain was way behind the body.