Title text:
In 1899, people were walking around shouting '23' at each other and laughing, and confused reporters were writing articles trying to figure out what it meant.
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3184/
Had a friend who wrote his french oral presentation out in 1337, he was allowed notes but not the word for word presentation. He showed the teacher beforehand, she said that's fine, looks like gibberish.