This document summarizes common mistakes and issues seen in bad presentations through a series of mock slides. Some examples highlighted include distracting slide designs that are hard to read, overuse of bullet points and sounds, lack of consistency in slide formatting, lack of preparation leading to unclear information, going over time limits, assuming too much prior knowledge from the audience, failure to engage the audience, reading slides word-for-word, prioritizing getting through the presentation over answering questions, using meaningless or overly promotional titles, and promising follow-up that never occurs. The document uses humor and exaggeration to illustrate problems often found in ineffective presentations.