Fred's System

Riddle: Fred is listening to the raido when it suddenly stops playing. Nobody is with Fred and nobody touches the radio. A few seconds later, the radio resumes playing. How can this be?

Answer: Fred was driving his car through a tunnel.

Source: https://www.riddles.com/index.php/2125

Fred is listening to the raido when it suddenly stops playing. Nobody is with Fred and nobody touches the radio. A few seconds later, the radio resumes playing.
How can this be? — Fred's System by Rachelle Vandiver v1.