One horse I new that "swayed" in the gross ties was doing because he went into training with another trainer and she wrenched him trying to teach him a lesson.. I will stop there.

Any hoo.. it happened to be a nerve pinched in the neck. After a chiropratic adjustment.. didn't do it again.

Now it was only because of the elevated ties in the cross ties that pinched the nerve. when he was in the stall no worries.

Hope that helps..