Hi I am currently writing a sci fi book for children, and I would like to know how it would feel to travel through a supermassive black hole. In this link a scientist claims that there is superhot dense plasma in black holes. I wonder if his description of a supermassive black hole, and how it would be to travel through it, is accurate? And is the "super hot dense plasma" quark-gluon plasma? For instance, he claims that we would not be "torned apart" if we entered a supermassive black hole. He says that the tidal forces are weak enough for you to travel deep into the black hole.