NOTE: this is a repost, the original post has disappeared.
As Bender the robot from Futurama would say: OH.. YOUR.. GOD!! I found links to MP3s of popcorn!!
For those of you that have never heard of popcorn, listen up.. Originally composed by one Gershon Kingsley, popcorn is one of the all-time greats. This track is instantly recognisable, and has been covered umpteen times. I found a site with 79 different cover versions of this Popcorn music track.