Photo date: February 25. 2017. Photographer: Mark Mahin.
I took the photos below while photographing nothing but ordinary drops of pure, clean water falling against a dark featureless background. We see 4 strange oval shapes within round orbs. This is one of countless cases I have shown on this blog in which a distinctive shape will appear multiple times unexpectedly in the same photograph of ordinary water drops falling.
Another example is below. We see two strange shield-like shapes at the top of orbs, both of which have a black vertical bar.