Rube Goldberg video- http://www.schooltube.com/video/45d3fd06a34e19297620/This-Too-Shall-Pass-Rube-Goldberg-Version-by-OK-Go
Lego Rube Goldberg http://www.schooltube.com/video/33f33da3de8b4bf0b256/LEGO%20Rube%20Goldberg
OKGO video with umbrellas- https://www.youtube.com/watch?v=u1ZB_rGFyeU