[small voice in the wilderness]

Thanks!

Barney arguing with (someone, I don't remember) and Andy walks in.
Barney: "Ange. How do you fight fire?"
Andy (with that bemused look on his face, messing with Barney's blood pressure): "With a water hose??"
Barney (giving Andy that wide-eyed look): "NO! With fire! You fight fire with fire!"

[Hillarys Gate Cult]

Earlier in the episode he asked Opie the same question about fighting fire and Opie gave him the same answer as Andy.