So let's take the trip from earth to this black hole sun. Your friends drop you off by a rocket ship at about 30% the distance to the sun. The sun's pull on you there is just a little stronger than the earth's and so you fall toward the sun instead of toward earth. You eventually pass the point where the sun's normal surface used to be, and continue accelerating toward the event horizon.

During the first part of the trip, your friends on earth have been keeping you company by camera. But sometime after you pass where the surface of the sun used to be, you begin to notice that your friends seem to be talking and moving faster and faster, as if you had hit fast-forward on a video recorder. Back on earth, your friends start to notice that you seem to be moving in slow motion and that instead of going faster and faster as you approach the event horizon, your ship slows down, too.