Examples:
(True) I was driving home from work and drove through the end of a rainbow; for a second or so, the car was full of rainbow colors.
We live in an urban area of the West Midlands, with a small garden surrounded by other houses. I had been pottering around in the conservatory when I glanced up and saw this enormous brown bird with yellow eyes perched on the bird table a few feet away. It was the first time I'd seen a sparrowhawk so close in the wild.
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Witnessing the monarch migration. I was driving along and thought a cloud was passing over, but I looked up and saw a literal cloud of monarch butterflies. I pulled over and got out, and was breathless, watching thousands of butterflies float all around me.