If the core of a stellar object supercedes that of three solar masses, gravity is so immense that it's crushing force actually
causes the core to implode to an infinitely dense, dimensionless point from which light can't even escape. The result is a monsterous cosmic phenomenon we commonly refer to as a black hole singularity.
Stephen Hawking, a leading authority on blacks holes in the science community, recently revised his theory on blacks holes, stating that eventually blacks holes do emitt their consumed material
in the form of radiation (Hawking radiation) when they begin to evaporate...whereas it was previously believed that black holes never emitted their consumed material.
If you are unfortunate enough to come across a black hole singularity in a space suit, and you were flying into it feet-first, the difference in gravimetric force on your legs compared to the rest of your body would literally rip you apart.