So I experience this with a few dancers. They lock their bodies up so that there is no elasticity in the connection. Let us take salsa. So when doing linear salsa I can move their hands in doing the basic but as soon as I start a move it is as if I have started a top spinning...no elasticity in connection as I normally would experience in let us say doing a followers double turn. I call these people "tops" as that is what they remind me off. Anyone experienced this? Not easy for em to explain, and for the more experienced dancers/teachers out there...how have you managed to change this?