The cork screw and head flipping doesn't sound good.
I would let her settle in still and see if it gets better. I don't know if it comes out more in times of stress.
The growth rate on my Coastal girl was nuts.
Feb 2012
Yesterday 6'
I have never "power fed" her. She eats once a week. A meal that leave a very little lump.
They seem more aware of what's going on compared to BPs for sure.
I hope she is just stressed a bit and will calm down in a few days.
Keep us updated.