Watched this through a second time, and decided my favorite moment is the two guys delivering the easel and library unit. "We have a few other things for you..." Sadly, we never see them return, and they don't even merit a name credit at the end like Helen and Roberta do. 
You are only on your 2nd time on this? I have lost count the number of times.
I've learned to pace myself after making the mistake of watching "One Turkey, Two Turkey" multiple times in one weekend, and then lying awake in bed unable to fall asleep as the insane turkey song looped endlessly through my head.
Although that probably wouldn't be a problem with this short.
I bet I've watched this 12-15 times now. Definitely my favorite short ever, beating out even Drugs are Like That, Moose Baby and One Got Fat. I particularly liked all the World War 2 references.
"You know, the more I think about this, all these changes could easily be undone later, and this probably DIDN'T require the planning level of the NORMANDY INVASION!"
And I actually
have started this playing and then gone to bed, falling asleep while it's still playing. More than once. Like Conor said, it's oddly hypnotic. (Plus I take prescription sleeping pills).
Now... One Turkey Two Turkey Three Turkey Four GOBBLE... Oh dammit.