It might have helped if you included the fact that it's a twist on a saying that goes, "If a tree falls in the forest, and no one is around to hear it, does it make a sound?"
On the internet, we're more likely to know of hipsters rather than old phrases.
The hipster might not cause it wasn't in a rain forest, but i can guarantee Tumblr is probably complain about how the white man made it fall under their oppression.