Most black holes shoot fireworks
Have you ever seen a rocket launch or fireworks? Black holes that are active perform such spectacles. This discovery only applies to supermassive black holes at the core of each galaxy. Scientists have found several active supermassives actively shooting jets across and beyond their Galaxy while many remain hibernating much like that near the Earth.
Those hibernating are waiting and feeding on more matter to expend their energy. Once full, it’ll begin its firework-type show of spectacular energy, much brighter and hotter than the sun. That would be better than any July 4th firework show.