One of the greatest monologues in film was Robert Shaw's speech in Jaws about what happened to him on the sinking of the USS Indianapolis. His harrowing story about the shark attacks was a great motivation for his hatred and dogged pursuit of sharks.
But it turns out this story pales in comparison to this story by Edgar Harrell, one of the real survivors of the sinking. Listen to this, and it makes you realize the true horror of the scene. Shark attacks were just the tip of the iceberg.