We can see here that "The Night Face Up" is a short story written by Julio Cortázar. The title holds significant symbolic and thematic importance throughout the story.
In the story, the title "The Night Face Up" refers to the dual reality experienced by the protagonist.
The story oscillates between two distinct worlds: the modern hospital where the protagonist lies injured after a motorcycle accident and the ancient Aztec world where he finds himself running from Aztec warriors hunting him down for sacrifice.
The night symbolizes a liminal space, blurring the boundaries between wakefulness and dreams, reality and illusion. The phrase "face up" may refer to the confrontation with one's fears or destiny.