The human brain is programmed to make out familiar images, so even in nebulous ones like those above we do the same. Human faces are something we seem hardwired to seek out, which makes sense. Pareidolia, how interesting. There really is a word for everything. Clouds can hide so many potential shapes, the Godzilla cloud you found was really cool! The one with the light shining through looks a bit like a kidney, and I'm pretty sure I saw a cat in those pictures somewhere!
!DUO