CAVE: "Alright, I've been thinking...when life gives you lemons, don't make lemonade."

GLaDOS: "Yeah."

CAVE: "Make life, take the lemons back."

GLaDOS: "Yeah."

CAVE: "Get mad!"

GLaDOS: "Yeah!"

CAVE: "I don't want your dang lemons! What am I supposed to do with these?!"

GLaDOS: "Yeah! Take the lemons!"

CAVE: "Demand to see life's manager!"

GLaDOS: "Yeah!"

CAVE:"Make life rue the day it gave Cave Johnson lemons! Do you know who I am?! I'm the man who's going to burn your house down! With the lemons!"

GLaDOS: "Oh I like this guy."

CAVE: "I'm going to have my engineers build a combustible lemon that'll burn your house down!"

GLaDOS: "Burn his house down!"

CAVE: <coughs>

GLaDOS: "Burning people! He says what we're all thinking!"

Best. Scene. EVER!