With most students back in school, it’s only fitting that we round up a few funny and geeky things people have found in textbooks around the world. Starting off, this author managed to sneak in a little footnote about the “Introduction,” two sections that apparently nobody reads. Other examples include: a random red panda in an HTML5 textbook, a warning about persons you may encounter in a dark alley, and lots more. Continue reading to see them all. Click here for a few bonus images.