DASC-99NP This video describes and shows how dangerous working around pile and bunker silos can be. In this video you can see an actual avalanche of corn silage so you can appreciate how dangerous it is to work around vertical silos. This version of the video is in English. There is another version in Spanish. The video was funded by the National Institute of Occupational Safety and Health (NIOSH) through the Central Appalachian Research and Education Center.