Astute cloud observers caught an unusual sight over the Seattle skies early Sunday morning that might have looked like something out of science fiction, but instead it was caused by something that's been around for over 100 years -- an airplane.
These clouds are called "hole punch clouds" -- caused when an airplane descends or ascends through a stable cloud layer, causing a visible rift.
KOMO Photographer Peter Mongilio captured this video from West Seattle:
And Twitteree @KANtext captured it from Queen Anne:
There have been other similar sightings across the world on occasion, like this one that made news out of Russia a few years back:
And here are even more examples that have been seen locally