Teaser for the upcoming documentary “Landfill Harmonic.” The film introduces the town of Cateura, a slum in Paraguay built atop a landfill where residents have created music from the trash heaped upon them. Scouring the rubbish, the determined music-lovers have built violins, cellos, and other classical instruments, resulting in the “Recycled Orchestra.” The preview of the flick has been going wild online. Twitter user @NikkyHolmes said, “This made my day a little brighter” and @garyploski tweeted, “Things like this should go viral.” Good news for you, Gary.