Apparently, if you live in New York City, they come off a massive 18-wheeler.

Seems obvious, but I never thought about it before. They seem to just appear in open air markets on street corners after Thanksgiving.

Late last night, I saw them rumbling through the streets on their way to street corners around Manhattan. Quietly taking their positions to wait.

And before you realize, it will be international dump your dead tree on the sidewalk day. One of my most hated of holidays.