Well, all Womas and Spiders carry the wobble, it's linked to the genes and you can't get around it. There is however a good margin of variance in the severity of the wobble from snake to snake, some barely display it and only people who knew what they were looking for would notice and then others shake like a maraca at the slightest movement. So in this case, you can pretty much chalk any weird head movements up to the wobble.