Call from Mr. Scott?

The other day when I was teaching I forgot to turn off my cell phone during class and it started to ring. One of my students asked, "Is that Mr. Scott?" I love how the students are so immersed in the storyline created in the world of Imagine Tomorrow. Why wouldn't the call be from Mr. Scott--the students just talked to him via webcam and were in the process of solving the Case of of Hide and Beek so they could email Mr. Scott and let him know that they solved the case.