What happens inside a black hole?

The answer

As you fall into a black hole, the difference in gravitational pull between your head and feet becomes so extreme that you undergo 'spaghettification' - your body is stretched into a long, thin strand. Beyond the event horizon, all paths through spacetime lead toward the singularity. According to general relativity, time itself essentially stops for an outside observer watching you fall in, though you would experience the plunge in finite time.