An international team of astronomers, led by SRON, has observed a sudden outburst of matter near the supermassive black hole NGC 3783 at speeds reaching up to 20% of the speed of light. During a 10-day observation, mainly with the XRISM space telescope, the researchers witnessed its formation and acceleration. Scientists often find that these outbursts are powered by strong radiation, but this time the most likely cause is a sudden change in the magnetic field, similar to bursts on the sun that cause solar flares.