Dancing With the Stars' semi-finalist Nyle DiMarco, who is deaf, has revealed how he is able to move to the beat without being able to hear it. He memorizes the timing of partner Peta Murgatroyd's moves. And if he's too slow, "I give him a good scratch on the back," Murgatroyd said. She also squeezes his hand to signal when he has to move. "I was definitely scared," he said, using sign language. "I didn't want to be off time and mess up the dance and people would assume deaf people can't dance." #InsideEdition