I was saved from a deadly descent into the jaws of death by two overhead cables, which yanked the car back from the chasm.
From an essay written by a native speaker.
The writer is talking about her experience of taking a cable car ride up the mountains. The writer feels scared as the car passes across peaks and over gorges.
Back: At a distance away. (According to Oxford dictionary)
Why does the writer pick "back" over "away" here?