REO Speedwagon - "Take It On The Run" (acapella - unnamed source)
U.N.K.L.E. - "When Things Explode" (instrumental)
After I found the REO Speedwagon acapella, I knew I wanted to go for an emotional feel for the song. After playing with a selection of slow tempo, moody tracks, I went to my reliable standby: U.N.K.L.E.! These tracks went together beautifully. Now, the video for this is another story.
When I was proofing the mix, I had a "Grindhouse" movie trailer DVD playing on another computer. I glanced over as the trailer for "I, A Woman" came on. It was so cool how the imagery matched up with the mash, so I ran over to my local badass obscure video rental place (Eddie Brandt's Saturday Matinee), rented the movie, and cut up the scenes to match the mashup.