AS TOLD BY DAVID NINOMIYA
One day, while she was doing her teaching thing, she just stomped on the ground. The class had no idea what she was doing or why she did it. She just smiled at all of us, and as if answering our perplexed looks, she said "it was a roach". After a brief pause, and checking to make sure the roach was dead, she looked up at us again, with another smile, and said "natural selection".