Mizuno Running uses Albert Einstein to promote its new running shoe. Part of a seven-figure integrated campaign is a parallax interactive website, "IfEinsteinRan.com," which offers videos and truths about the company's running ideology. The website also has a two-part video where Einstein tries to solve the mystery (it's mathematics!) of the ultimate run. The second part shows him solving the riddle, producing Mizuno's "theorem" -- (R+Id+E) for the perfect run.