He falls asleep during the opening scene at a train station just as the train whistle sounds.
After that, Charles keeps hearing a persistent whistle sound throughout the rest of the episode.
Charles also notes that the films opening scene plays out in near-silence.
Instead of having a silent opening scene, it has a silent ending.
Only Murders in the Building follows three strangers, each with a shared interest in true crime, who team up to investigate a death in their apartment building, unraveling secrets and uncovering unexpected twists.