"Flashbulb memory" describes the tendency of our memories tend to focus on a few salient, random images, typically those connected to the emotions associated with the remembered event but also social psychological factors. Memories that involve a shared identity with others or that are rehearsed with others are more likely to achieve flashbulb status.

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Reference

Shiller, Robert J. Narrative Economics: How Stories Go Viral and Drive Major Economic Events. Princeton: Princeton University Press, 2019.