Call a random friend and confess your undying love for them. Start telling them what you love about them, that you should marry, sobbing your eyes out that you can't live without them.
Go outside and wave to everyone passing for 5 min.
Ask someone if you can shave their body. If they say yes, you must comply.
Go ice skating in only your undergarments for a minimum of ten minutes.
Write a love letter to an acquaintance and send it via the mailbox. The catch: write it and sign it as someone else.
Pretend someone’s hair is your crush and ask it out.