flashback

noun

1. a transition (in literary or theatrical works or films) to an earlier event or scene that interrupts the normal chronological development of the story

Definition categories: communication, transition

2. an unexpected but vivid recurrence of a past experience (especially a recurrence of the effects of an hallucinogenic drug taken much earlier)

Definition categories: event, recurrence, return

verb

1. (intransitive) To undergo a flashback; to experience a vivid mental image from the past.