In movie blockbusters, we learn that artificial intelligence can rise against humanity and sound the death knell of the world. Is this just Hollywood fantasy or already reality? And why is Elon Musk “afraid” of the AI future? In this talk, we will deal with failed AI learnings and the abstruse results that can be created by such learning attempts. Here we will have a look at difference areas of AI like NLP or reinforcement learning. Ever thought about a PacMan that is controlled by an evil AI and how such character would act? We will look at the errors that can occur during learning processes. Here we will not only see amusing results, but also scenarios that can be a real danger in a productive environment. In the conclusion will also take a closer look at the causes of these failed learning processes and discuss what can be done to avoid such problems and pitfalls.