flashback

noun flashback

• hallucination — a sensory experience of something that does not exist outside the mind, caused by various physical and mental disorders, or by reaction to certain toxic substances, and usually manifested as visual or auditory images.
• recollection — the act of re-collecting or the state of being re-collected.
• memory — the mental capacity or faculty of retaining and reviving facts, events, impressions, etc., or of recalling or recognizing previous experiences.
• recall — to bring back from memory; recollect; remember: Can you recall what she said?
• reminiscence — the act or process of recalling past experiences, events, etc.