Some morphs have a genetic neurological kwirk that is commonly referred to as wobble. It can range from hardly noticeable at all to full on corkscrewing. This typically presents itself when feeding or stressed.
With that said, I do not believe pastel or it's super form have the wobble. Unless the animal in question has another Gene you are unaware of this is likely not wobble.
Also, I believe the genes that have the wobble trait are all Co dominant which means you should see the gene on the animal as there are no recessive or het versions of them.