[WildHighlander57]

The still pic you posted is from when she first started the involuntary head bobbing, note the grimace on the orange fingernailed lady as it starts

https://m.youtube.com/watch?v=YMHOcmDVBP0

[tomkat]

To me, it looks very much like orange fingernail girl is mouthing 'are you ok ?' at ~0:05.
It's then several seconds later that the witch tries to recover and play it off as a joke.

[rlmorel]

LOL, I am embarrassed to admit I didn’t realize that both angles were from the same incident...the lighting seemed so different, but after I looked...

Yeah, that would have bugged me out too, seeing someone do that in front of me. Thanks for clarifying that...

[SE Mom]

Ok, that is bad. Really bad. I hadn’t seen the slow motion version until now.

Something’s going on with her. Something serious and we need to know what it is.