How to Make People from Harry Potter Annoyed and Angry!

Just read the title. It says everything. If you didn't...you're really dumb. Also, I am not responsible for any harm come to you or others when doing these at home. These were tried by professionals, and not uneducated randoms off the street. But I'm sure you're educated, since you can read. So, if you're smart, DO NOT try these at home. {Randomly Updated Whenever}