The annual alleycat that races to get food to feed the hungry.

cranksgiving.org

Here is a lengthy press release:
CRANKSGIVING 11
November 21, 2009 2pm
Madison Square Park, New York City

For over a decade, the New York Bike Messenger Foundation (NYBMF), a 501(c) 3, has successfully organized Cranksgiving, a charitable alleycat race held in New York City. [...]