I was on Santa Monica Pier at 1:45PM PDT, and I notice far to the north was what looked like a fata morgana - a type of mirage where objects get stretched and inverted. It was quite hard to see and I doubt many people (if any) had noticed it. I took a few photos. These have been "dehazed" in Photoshop:
Notice the above two images are of the same region, taken just 30 seconds apart, and yet look very different. Here's a slider comparison:
This made me wonder if fata morgana might be responsible for occasional UFO sightings, as it could make things appear and disappear, and even seem to move. When the mirage just catches the tip of something like a tree it can make it hover in the air like a flying object. Like this:
Here''s the most UFO-like section of the video I shot. Close up looks like some objects becoming visible.