The year end lists are coming fast and furious! Here's one you don't see year after year, since flash mobs have only recently been numerous enough to invite ranking. Each one has a video, so you can see whether they deserve the honor. Pictured is the promotion for Elf Yourself last month in New York City. Link
Let that soak in: an elf event... a few weeks before Thanksgiving.
Regardless, considering it's NYC, nobody really cared.