I was wondering... Why does Tyrant head bob at random times at absolutely nothing? Like few minutes ago when I showed my brother how to support a dragon, after he left Tyrant crawled up my arm and head bobbed. He also head bobbed once at his shadow and once when he was out his viv for an extended time, when he was back he realised the substrate has changed (carpet to towels) and head bobbed for a few minutes. Is this good or bad?