You pick up the phone and start chatting with Tim, the crazy puppet, a.k.a. the army demolition expert in the other room.
TIM: HEY! I concocted an explosive that can vapourize metal, but leave fabric safe.
YOU: Umm. That might not be a very safe idea.
TIM: Metal, metal, hee hee hee!
YOU: Are you sure you know what you're doing?
TIM: Yeah! I tested it already in this room!
YOU: WHAT?!?
TIM: Just kidding. Hee hee.
YOU: Uh. Why don't you test it over there?
TIM: Oh, okay! Bye!
The only thing you learned is not to invite Tim for a barbeque. Now you can:
A: Turn on the little monitor embedded in the desk
B: Stick your head out and yell back and forth
C: Turn on all the television screens and look at the other room.