BEYOND EXPLOSIVE. “The gravitational collapse of a ball of radiation the size of the horizon at the QCD epoch onto a black hole of a solar mass is an extremely violent process, where a very dense plasma of relativistic particles acquire energies thousands of times their mass out of the gravitational potential energy of the collapse.” (QCD = quark matter).
https://royalsocietypublishing.org/doi/10.1098/rsta.2019.0091