For the holiday season I made and sent out this a Code Geass Holiday Card, everyone who got it liked it.
This is the starting image:
Then you read this image:
The joke is is that it is supposed to be a Geass command.
And anyone who receives a Geass Command from Lelouch has to obey him.
His Geass is “absolute obedience.” So they have no choice.
See this article http://codegeass.wikia.com/wiki/Geass#Lelouch.27s_Geass
Here is an English dub clip:
And the full section in Japanese:
This is more of fan humor, but it works.