Daniel is wrapping up his conversation (they all sound like arguments), and it means he gets to backpedal and give Louis a comically incredulous look.

Where have you been!

Did Louis just try to Dad Voice him. Does Louis have one of those? He must, of course. The look on Daniel's face is of compulsory consternation of being a practically-70-year-old hearing that kind of inquiry, and also stupid affection. Did you really. He did.

"Errands."

As Per My Electronic Mail (Sticky Note).

"Nothing exploded while I was gone?"