Finding some cool public domain video at archive.org to put as a backdrop to Radiohead's brand new track "Little by Little" from their CD The King of Limbs was a fun exercise in disparity of time period and serendipitous web exploration.
A quick mashup of some Prelinger archive atom bomb testing with the latest from Girl Talk's CD All Day track 1 - Oh No. Although there was no concerted effort to match up particular parts of the music with the video, at some points the results were serendipitous.