To serve, peel and slice bananas; reserve 4 slices for garnish. In 4 parfait glasses, layer half of the pudding, the crushed wafers, and the banana slices. Top with remaining pudding. If desired, using a sharp knife, carefully cut the chocolate wafers into quarters. Tuck one piece of chocolate wafer into each serving. Garnish with reserved banana slices. Serve immediately. Makes 4 servings.