Travelling up Shrek's colon

At my wife's graduation from travel school, we (the husbands, in-laws and thus-and-such) sat in Benaroya Hallin downtown Seattle, and watched these faraway people pick up their diplomas. Very refreshing to have all of 20 people at a time come up. Between the speeches and musical presentations (I think there was music, anyway) was a computer-generated interlude, an animated sequence apparently travelling up Shrek's colon.

I'm serious.

It was an animated sequence, short, with pulsating music (for when you REALLY have to go...) and the camera's view crawled up this wide, circular psychedlic-colored tube. It never made it up to the stomach, and would always face forward, even when it came up to a corner, but there it was - Shrek's colon. Luckily, he hadn't eaten in a while. We had no, uh, companyon the trip up.