He was a short slender young man of about twenty. I was afraid of him-afraid of something-and as he
passed me on the trail I threw a grenade that exploded at his feet and killed him.
The excerpt is an example of
flashback, because the narrator is remembering a conversation with his daughter.
flashback, because the narrator is recalling an event that occurred during the Vietnam war.
frame story, because the narrator is describing an action that he deeply regrets.
frame story, because the narrator is explaining why he feels he must tell his daughter what he did.