He knew this because he was getting that odd tugging sensation. He did not know whether it was from being in this world for as long as he had been or something else entirely, but whenever he had encountered or been close to an instance of the spontaneous singing phenomena people of this world sometimes fell victim to, he increasingly felt compelled to… to join in. It was the damnedest thing, really. He had first noticed it in Skymount, when he had been walking down a particularly sunlit street one day. Some down-on-his-luck Joe Bloggs had been celebrating a major achievement of some life goal or another – Handy hadn’t been paying attention – and an entire quarter of the city had erupted into life in one of the grander and more alarming instances of the phenomenon Handy had ever witnessed. He passed no remarks, thinking nothing more of it until he noticed he had been humming along to the tune, keeping rhythm and pace with those other bystanders on the radius of the song's field of effect.