Given a big enough black hole, nothing much seems to happen as you cross the event horizon. But, once inside, you find that it is impossible to move away from the singularity any more. In fact, it is impossible to even stay still in one place. As you move inexorably towards the singularity, tidal forces stretch your body until you are "spaghettified" into a long strand. At this stage, you are dead, but your remains continue until they hit the singularity. What happens then, nobody knows.