The Secret Unus Annus No-Touchy-Touchy Hand Shake

Summary
Mark and Ethan practice secret handshakes separate from another via video chat. Half way through the video, the duo makes up an Unus Annus handshake under the name #HandMyAnnus (Mark initially wanted to call it #HandusAnnus, but later went with Ethan's suggestion) as a memento of their time spent together on the channel.

As a separate challenge, Mark and Ethan ask of their audience to create a TikTok Unus Annus dance and post it under #DanceMyAnnusOff for them to learn at a later date.