Last night I was back in the tower, but the planes had no pilots

I'm standing in the old tower at 3am and every blip on the scope is moving perfectly — holding patterns, descents, all textbook. But nobody's answering. I keep keying the mic and getting that soft carrier hum, like the whole sky is just going through the motions without anyone inside. Woke up oddly calm about it. Maybe that's the difference between a nightmare and a memory you've finally filed away.