What is it, exactly?

My little Wheatley is a spider morph. I've been watching videos about it, and people say it's very serious... Wheatley kind of wobbles a bit, but hasn't gone upside down or started shaking. He seems to be fine as far as striking out at his prey.

Do snakes have a natural small wobble to them? Or is this a clear sign of this "wobble?"

Is it a muscular control issue? Is there any other signs associated with this that is detrimental to the snake's health? Is there anything I can do to help/prevent it?