"What is that supposed to mean," Glacius growls, stepping away himself as Nux stumbles backwards; that had been very unpleasant. It's only when he's put some space between them that the meaning of the human's words click. "Of course I am cold, my skin is made of ice." This is said as the alien rubs at the spot where the human had touched him, like he's trying to clean dirt off. It's nothing against you personally, Nux--he just really doesn't like breaches of his personal space.