The water on this leaf (unknown name) does not behave like usual. The water does not roll around and just fall off like it does on other leaves, instead it clings to the surface of the leaf as if the leaf has some kind of water repealing surface and appears to be like a Mercury.
Given the fact that we all have seen it around but never tried to understand the science behind it, it's not less than a magic our beautiful nature shows to us every day.