Refocusing on the alarm: We refocus attention from the surroundings to the source of the false alarm.
Closing the alarm: There’s a brief description to close the false alarm and put it to rest.
Callback to earlier detail: Then we have a fragmentary callback to an earlier detail for resonance.
For the callback, choose a detail you’ve used before that will resonate as you close this false alarm.
Tim Winton sets a high bar here with Burke and Wills: two tail lights, two explorers, both disappearing into the bush, never to return—it’s an evocative detail.
Don’t worry about hitting this benchmark. Focus on choosing a detail that you’ve used before and makes sense as a callback at this point. If it has some kind of emotional resonance, that’s a bonus.