Why Solar Eclipses Create Those Crescent-Shaped Lights

Everyone is watching the sky during a solar eclipse, but but if you look down, you'll catch another kind of light show.

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Sources:
https://eclipse.gsfc.nasa.gov/SEcat5/SE2001-2100.html

Pinhole cameras:
http://inside.mines.edu/~mmyoung/PHCamera.pdf
http://www.amazingcameraobscura.co.uk/howitworks.htm
http://practicalphysics.org/pinhole-camera-lens-camera.html
http://www.wesjones.com/pinhole.htm
https://www.timeanddate.com/eclipse/make-pinhole-projector.html
http://eclipse.illinois.edu/2017eclipse.html
https://eclipse.aas.org/eclipse-america/eclipse-experience
https://cg-masters.com/nicks-rants-and-raves/effect-of-solar-eclipse-on-shadow-quality/
http://www.schoolphysics.co.uk/age11-14/Light/text/Shadows/index.html
https://mysite.du.edu/~jcalvert/astro/shadows.htm
https://physics.stackexchange.com/questions/139077/what-is-this-light-pattern-caused-by-led-matrix-street-light
Images:
https://commons.wikimedia.org/wiki/File:Total_solar_eclipse,_La_Silla_Observatory,_2019.jpg
https://www.istockphoto.com/photo/crescent-highlights-and-shadows-from-eclipse-gm836818212-136187651
https://www.istockphoto.com/vector/tree-set-realistic-vector-illustration-gm689550818-127018379
https://en.wikipedia.org/wiki/File:IMG_1650_zonsverduistering_Malta.JPG
https://www.flickr.com/photos/mjambon/7424199900/
https://images.nasa.gov/details-jsc2017m000793_2017Eclipse_4K_YT.html