"Robert Lyons"
You all probably know about using pinhole viewers to see an eclipse.
You may also know that you can view an eclipse with a fragment of a
mirror, if it is small enough (or if you cover up most of a larger
mirror, leaving a small hole). It will project a perfect image of
the eclipsed sun on a convenient wall or floor. I'm pretty sure this
is what I was seeing from the air, projected on that flat haze layer.

A cute pinhole eclipse image I've seen was in a conference room with thin
slat blinds covering the windows. Every slat had two or more little holes
for string or something. Every holes shadow projected on the floor showed a
perfect little eclipse. There many dozens of them.