Pathos is to persuade by appealing to the audience's emotions. As the speaker, you want the audience to feel the same emotions you feel about something, you want to emotionally connect with them and influence them. If you have low pathos the audience is likely to try to find flaws in your arguments.
A construction worker dies by falling off of a faulty ladder. The worker tiles roofs and his ladder fell, causing him to hang. The worker fell due to loss of his grip.