Why is it funny in films or literature but slippery in reality?

We are referring to faulty reasoning, also known as logical fallacies, erroneous or invalid arguments one uses to strengthen their position. There are dozens of articles and books explaining various types of these errors and teaching to avoid them. Together with that, many writers have used faulty reasoning to make a plot more captivating or to give more power to an advertisement – and for some reason, we tend to like it.

How does it work and where can logical fallacies (un)expectedly be found in real life?