So what movie was the 7up singing clip?
Repo Man:
Kevin: [singing] ... feelin' 7-Up, I'm feelin' 7-up. Feelin' 7-up, I'm feelin' 7-up...
Otto: Kevin, stop singing!
Kevin: What? I wasn't singing, guy.
Otto: [Stamping a price tag on Kevin's glasses] I'm standin' right next to you and you're fuckin' singing, cut it out.
Kevin: Why so tense, guy?
http://www.imdb.com/title/tt0087995/quotes