Bobby Singer: You got a trickster on your hands.

Dean Winchester: That's what I thought.

Sam Winchester: What? No you didn't...

Bobby Singer: Well, I gotta tell you... you guys were the biggest clue.

Sam Winchester: What do you mean?

Bobby Singer: These things create chaos and mischief as easy as breathing. And it's got you so turned around... and at each other's throats, you can't even think straight. The laptop. The tires. It knows you're onto him. And it's been playing you like fiddles.