Objects don't move at the speed of light as they enter a black hole. Matter cannot reach the speed of light because there is not an infinite amount of energy in the universe. To an outside observer, objects may appear to move at the speed of light but to some one being pulled in, time would begin to slow to a stop, but never actually stop, they would never experience being pulled in. To itself what ever being pulled in would exist forever, but to every thing else it would be pulled in almost instantaneously.