Step 2: Have one person in a mask dance solo.
Step 3: When it goes "do the Harlem shake," have everyone in room start dancing. It's super simple!
This power ranger tried to do one and didn't really do it that well...
youtube.com
This cool dude did one with a bunch of sexy ladies...
youtube.com
This receptionist in a Boba Fett helmet did one...
youtube.com