they know magic
Demotivational poster / demotivator description: Hamster wizard (or maybe sorcerer - who knows) holding his magic wand. Behold the power of the magic! I wonder if he knows black magic as well? If we want to find out, we need to provoke him to use his magic skills - offend him or something... Come on! We have to know he isn't a warlock like Snape from Harry Potter.
Demotivator related joke:
During a recent vacation in Las Vegas, a man went to see a popular magic show. After one especially amazing feat, a man from the back of the theater yelled, "How'd you do that?"
"I could tell you, sir", the magician answered, "But then I'd have to kill you."
After a short pause, the man yelled back, "Ok, then... just tell my wife!"