http://www.newsweek.com/supermassive-black-holes-can-create-galactic-fountains-are-100000-light-years-1215380

A fountain in a garden pond could shoot a plume of water to roughly 3 metres (9 feet) in height. By comparison, the famous fountain on Lake Geneva launches a plume of water up to 140 meters (459 feet) into the air. Now imagine a fountain launched from the center of a galaxy, with a supermassive black hole acting as the pump. How far do you think this plume would extend? The answer is more than 100,000 light-years. 

We know this as we have just spotted such a fountain—spewing out incredibly cold gas rather than water—in a giant galaxy at the center of a cluster of galaxies known as Abell 2597. Astronomers have long believed that such fountains must exist in some galaxies—continually circulating fuel that can form stars. Now our findings, published in The Astrophysical Journal, finally prove they do exist in nature.