A memo (short for memorandum) exists to BRIEFLY and CLEARLY pass information within an organization. It could be a policy update, a project reminder, or even simply a company announcement.

They contain:
1. Header Info
2. An introduction which states the purpose
3. Background details
4. Call to action / conclusion / reminder
5. Courteous Conclusion

You are now TRAPPED in a genre fiction piece! You work for a company in that genre! (scifi. horror. fantasy. western)
Write a memo for your new, fictional company. 
Make it the weirdest, silliest memo you can make it while still using a professional tone and writing for your audience.