Drop falls into a thin layer of liquid

These pictures expand the topic "Drop falls into a cup of coffee" that is described in its own section. Compared to a drop falling into a thick layer of liquid, in the thin layer the energy cannot be used for creating waves efficiently and is rather used for accelerating the liquid and scattering it into many tiny droplets. The last two pictures show a small ring created by a second drop inside a larger ring from the first drop; the third drop is just arriving.