From livescience.com/space/b…(edited for clarity):

Astronomers have spotted a supermassive black hole whipping up cosmic winds at record speeds. "We've not watched a black hole create winds this speedily before," said astronomer Liyi Gu. He and his colleagues are studying the bright, busy region surrounding the supermassive black hole …. known to flare suddenly and belch jets of material and wind. Gu colleague Matteo Guianazzi said the flares are "on a scale almost too big to imagine."