My personal favourite (apparently an ad lib from an extra that got him bumped up to a speaking part's pay):
"You're all individuals!"
"Yes, we are all individuals!"
"I'm not..!"
"You're all individuals!"
"Yes, we are all individuals!"
"I'm not..!"
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'