[If there was any way to feel the difference as someone that naturally doesn't require sleep and this strange wakefulness? It's easy to tell. He's restless in a way that doesn't have to do with anything in particular.]
What is it this time...?
[Priorities will come first, to check if the same is happening to those that he shares close quarters with. But for now, he mutters to himself quietly and may just be found later walking out for lack of a better way to deal. Run into him?]