what's that noise

Last night after Nate went to bed, we were Skyping with Laura and Steve in Colombia (very cool!) and, near the end of our call, Nate started crying. Thad went up to calm him down and when he entered the room Nate asked, "What's that noise?" Thad wasn't sure what he meant, so Nate added, "Mommy woke you up." Whoops!