Some great quotes from the people who made a holiday classic. I love this nugget...

For the dog and squirrel chase, we hired an animal trainer who trained them everyday for months to run through the set. When it came time to finally shoot what we've been planning, I got out of my car and saw everyone standing in a huddle shaking their heads and I knew something was terribly wrong. I asked them what was going on and they said, "We have a problem." Okay, what? "The squirrel's dead." I said, "Holy fuck, we're shooting that today!" And the animal trainer turned and said, "Ya know, they don't live that long." We still had to shoot the scene, so we used an untrained squirrel. It was just total chaos.