Your on his side. You're with Butters when he kills Hiedi and Bebe Via Electrocution. He has always been brutal, but it's still weird. He smiles as he looks at the bodies and then disconnects the car battery.

[Butters[: "Isn't this great! This team is perfect!"

He laughs and smiles

[Butters]: "I'm the Brains, and you're the... uh... looks..."

He shrugs as he cleans up