I have seen it before, this one has bad quality, and btw that's not Windows Paint, its Macromedia Flash MX.
Saw this a while ago on different sites (There are better quality versions out there), but it still never ceases to amaze me. The animation rocks, of course, but the concept is so original and creative, it's stunning. I sincerely hope this never gets plagiarized in any form.
holy crap , that person who made that is so ---!!!! I wish i coulld do something like that some day some day....