Which excerpt from The People Could Fly reflects the historical fact that some enslaved people were able to escape?

Another and another fell from the heat. Toby was there. He cried out to the fallen. . . .
But Toby just laughed. Say he threw back his head and said, "Hee, hee! Don't you know who I am?
Then she felt the magic, the African mystery. Say she rose just as free as a bird. As light as a feather.
Sarah couldn't stand up straight any longer. She was too weak. The sun burned her face.