If you haven't seen Inside Out, the latest Pixar movie, yet, you should, because it's excellent, but the ticket is worth it purely for Lava, which is being shown before it. It's the story of a lonely volcano whose only wish is to have "someone to lava"; the song is beautiful and the animation is pretty spectacular. Who knew a lava-spewing volcano could make you cry?
(Unfortunately, the film itself isn't on YouTube yet, but even the song and still images are probably enough to get the tears jerking.)