A Summer Night’s Dream by Mike Rosinski. The photographer planned about a 45 minute exposure but fell asleep and the lens stayed open for about 3 hours until the battery died. The result is above (the yellow streaks are fireflies).
“Setting up on a summer night, photographer Mike Rosinski began his exposures, initially planning to capture about 45-55 minutes worth of star trails from his yard in Hartland, Michigan, USA. But he dozed, only to awaken some 3 hours later to find his camera had continued to run until the battery died. Composing the resulting images, the graceful concentric star trails were expected, along with light from a late rising Moon glinting on windows. Still, as he slept on the warm night a blizzard of yellow streaks flooded the scene, not left by fairies but fireflies.”