* The Death of Sirius Black: Harry has a vivid flashback to Sirius's death in the Department of Mysteries, triggered by his grief and confusion over what happened. This flashback is recounted from Harry's perspective, with emotional intensity.
* Umbridge's Intimidation of Harry: Harry remembers how Umbridge interrogated him about his supposed connection to Voldemort, highlighting the fear and helplessness he felt during that encounter.
* Harry's First Meeting with Voldemort: Harry has a flashback to his first encounter with Voldemort at the age of one, triggered by his memories of the night Cedric Diggory died. This flashback reveals the connection between Harry and Voldemort and foreshadows their future battles.
* Harry's Time in the Pensieve: Harry uses the Pensieve to revisit memories of the past, most notably his encounter with the locket Horcrux in the Burrow. This allows him to understand Voldemort's plans and motivations.
These flashbacks are crucial for the plot, helping to build tension, develop character, and deepen the reader's understanding of events. They add depth and emotional resonance to the story.