English Trainer Chronicles: "Something"

Scene 1: I'm in Manila, at my work station. Learner is in Europe, in what learner calls a "meeting box," which is like a meeting room, but smaller. We are talking about the lesson, and learner is suddenly quiet.

Me: Hello?
Learner: Something is entering my box!
Me: (Instantly alarmed; imagines all sorts of "somethings.") What?
Learner: A colleague.
Me: Oh... (Laughs) You don't use "something" for people!
Learner: I mean, someone!
Me: (Continues laughing) ...
Learner: He is not saying anything. He must not speak English very well.