I have a coworker like that with our office phones. Our phone system rolls over to ringing the entire office if the original person doesn’t pick up. Phone lines will be dead silent all day long. Then this one coworker goes for a quick 15 minute walk, and instantly gets six phone calls back-to-back, which inevitably rings the rest of the office for each call. Then as soon as the last call wraps up, she casually strolls back in from her walk.