flashbulb memory
n.β Β«The theory of “flashbulb memories” holds that shocking eventsβsuch as a presidential assassinationβare created in a unique process that sears an image into the brain like a photo.Β» ββRemembering 9/11″ WWAY-TV (Wilmington, North Carolina) Dec. 19, 2006. (source: Double-Tongued Dictionary)