Largest Rube Goldberg Machine: Purdue team set new world record (2012)

From YouTube: "WEST LAFYETTE, Ind., USA--The Purdue Society of Professional Engineers team smashed its own world record for largest Rube Goldberg machine with a 300-step behemoth that flawlessly accomplished the simple task of blowing up and popping a balloon - setting the new world record for the Largest functional Rube Goldberg machine, according to World Records Academy"