What is another word for have a flash?
Pronunciation: [hav ɐ flˈaʃ] (IPA) 
Having a flash typically refers to the moment when an idea or realization suddenly comes to mind. There are several synonyms that one can use in place of "have a flash". For instance, "a sudden insight" can be used to indicate the occurrence of an epiphany. "Eureka moment" is another popular synonym that conveys the same idea of sudden discovery or understanding. Alternatively, phrases such as "lightbulb moment," "brainwave," and "a moment of clarity" can be used to express this sudden realization. All of these phrases help to convey the same idea - a life-changing or significant moment of understanding that happens suddenly.
