When someone like Robin Williams passes away, it can take a while to fully appreciate how much we really lost.

An incredible body of work, decades of laughter, and a soul that touched many.

Not just in our world, but in the animal kingdom.  Back in 2001, Mr. Williams met the infamous signing gorilla, KoKo.

And according to her handlers, she was visibly shaken by the news of his passing.  The animated gifs and follow-up pictures are heartbreaking.