On November 17, 2004 an episode of South Park had the boys producing a television news show for school, and when they couldn't come up with ideas to compete with a more popular show, they got fucked up on a bunch of cough medicine and had a bunch of exaggerated open-eyes visuals (in similar style to the movie Altered States I must say). Then they have a story on their news show about cough medicine abuse.
Quite funny to any dexheads out there. I downloaded the show and spliced the cough medicine abuse parts. You can download the clip here.
Not that great of quality and I used the 3ivx codec. If it doesnt work than try looking for the media player called "Mplayer."