Given 24 hours to answer the Ice Bucket Challenge

Given 24 hours to answer the Ice Bucket Challenge, Campbell posted his video online and in turn challenged Bruins teammate Brad Marchand. Marchand accepted the challenge and quickly threw the gauntlet down at four other teammates, including forward Chris Kelly and defenseman Torey Krug.

The Ice Bucket Challenge has expanded at an incredible rate since then, with dozens of NHL players, coaches, executives and even mascots answering the call. In the past few days, those accepting the challenge have included Sidney Crosby, Steven Stamkos, John Tavares, Tuukka Rask and P.K. Subban, along with coaches Jon Cooper, Jack Capuano and Claude Julien.

Some players have added their signature to the challenge. Mike Smith of the Arizona Coyotes had a bulldozer drop the water over his head, and Marc-Andre Fleury of the Pittsburgh Penguins dressed in a banana costume before taking the plunge alongside his family.

The remarkable movement hasn't been confined to the NHL. Athletes from a number of sports have participated, as have actors, politicians and corporate titans.