[UPDATE (3/8): I tweaked the video a little bit since it was first posted. The original version can be seen here. The newer version is now below, although it drives me crazy that YouTube doesn't let me choose my own poster frame; this one sort of gives the context away.]
I don't really know why I woke up this morning thinking this needed to be done - but now it's been done.
[UPDATE: see explanation of my intent here in the next post up.]