One major aspect of Einstein's theory of relativity is known as time dilation. Time dilation establishes that when something is going near the speed of light, or when near immense gravity, time slows down for that object compared to outside objects. This happens because the speed of light is always constant, no matter what. In order for an object in the presence of strong gravity, where light is bent, to record the same speed of light as an object in normal gravity, time must slow down for the first object. Near black holes, time slows down for objects descending into the black hole.
As you fell into a black hole, outside observers would see you slow down as you approached it and eventually freeze altogether at the event horizon. Due to the high gravity, time dilation makes you appear as slowing down, and the event horizon light cannot escape, so an outside observer cannot view you past this point.
Do to the time dilation that you are experiencing, you would view the Universe in fast forward, as the light from the Universe warps in the gravity and reaches your eyes in the black hole.
As you reach the center of the black hole, the singularity, space, and time are infinitely distorted. At this point, space and time essentially switch places. Normally, one can choose where they move in three-dimensional space, while time marches forward without our control. In a black hole, space is one dimensional due to gravitational distortion- you can move only toward the singularity.
While most think that meeting the singularity is the only possible future at this point, some theorists speculate that since space and time have swapped places, you would now be able to choose where to move in time, resulting in possible time travel.