"Tour" of the Orb Patterns

Photo date: May 9, 2020. Photographer: Mark Mahin. 

I took the photos below while photographing only ordinary drops of pure, clean water falling in front of a black featureless background. On this day I got what I sometimes call a "pattern tour," in which I see a series of different orb patterns appearing, each pattern appearing for many consecutive photos. One pattern was the one shown below:

Then there was the pattern shown below, consisting of a pair of ring shapes on the left:

Then there was the pattern shown below, consisting of a semi-circular shape at the bottom right:

Then there was the pattern below consisting of a rectangular shape at the bottom right: