Dogs know a lot of tricks. Sitting. Shaking. "Speaking." They do not know magic tricks.
In fact, their adorable dog brains CANNOT HANDLE magic tricks. Just watch what happens when this magician, Finland's Jose Ahonen, performs the most basic of "disappearing dog treat" tricks (you'll probably see how he does it, because you're a person who understands magic tricks).
The best reaction is from a German Shepherd named Nakke, who's like...
"Real funny, guys."
"This s--t? Again?"
The second best is from Sälli, who has the complete opposition reaction:
For the record, Jose says, "All the dogs got treats before and after the trick :)"