A brief, well-crafted story that is relevant to your topic is one of the most potent ways to maintain the attention of your audience. But the story must be kind.
Benjamin Disraeli said: "Never tell unkind stories." Inconsiderate and insensitive stories do not bring grace to those who hear them, and may actually leave the audience dispirited.
Taken from: Presenting with Credibility: Practical Tools and Techniques for Effective Presentations by Bruna Martinuzzi