A friend of mine used mencoder to assemble a couple of years' worth of webcam stills of the assembly of the Atlas experiment (link to original video at the end of the post):

(note:inactivity period is christmas - new year break)

The Atlas experiment is one of the five experiments built into the LHC. The biggest hope of the LHC is to detect Higg’s Boson. Each experiment have a brother which should be able to corroborate any results using a different method.

BoingBoing blogged it two days ago, so it is about time I post this video. You can find the original file without YouTube compression here ( 78.2 Mo, 704x576 ):
http://www.sharebigfile.com/file/47388/AtlasJura.avi.html.