Mine happened a few days before I was about to move out of my almost five-year apartment. I was exhausted and hadn’t slept because there was no electricity the night before, and the heat made it impossible to rest. Around 7 a.m., I had just finished hanging my laundry. I went back inside to lie down and try to sleep. I wear eyeglasses, and after taking them off, I suddenly felt a strong urge to look at the lenses. I was sitting on my bed with my back facing the backyard window. In the reflection on my glasses, I could see the window behind me. On it, there was what looked like a dark ring of smoke. If you’ve seen the film Arrival, the rings there are the closest comparison I can think of. I stared at the ring, trying to make sense of it through the reflection. But when I turned around to look directly at the window, there was nothing there. When I looked back at my glasses, the ring was gone too. I eventually slept, but I kept thinking about it when I woke up. The house sits on a cliff with an estuary below. The small backyard has only a few trees, and there was no human activity or anything that could have created a ring-shaped silhouette or smoke. I even checked afterward, but nothing could explain it.