Lyric discussion by pincushman 

Cover art for Ode to Billy Joe lyrics by Bobbie Gentry

This song causes the listener to visualize the story and fill in the details about their relationship and what is thrown off the bridge. And everyone writes in their own story - which is great!

But I think the point of the song is in nature of the conversation over dinner. The news devastates the narrator (she can't eat) while the family goes on eating and talking. Everyone is so wrapped up in their own lives.

[Edit: Typo]