OT: Looking for "Muppet's Last Words" and "Evil Ronald Mc Donald"

Hi! There was these two hi-larious clips on a show like David Letterman. I originally saw them on the website for whoever it was that did it. One had muppets getting killed by way of the professor drinking acid and stuff, and Evil Ronald threw out people's burger king stuff. I can't find it anywhere! does anyone remember these clips or know where i can get them or who did it?