Starting with the very first "Just Do It" ad in 1988 (hard to believe it was that long ago) Nike has had some of the most ground breaking spots in any product category. Here's a roster of the best. They include the first ad featuring 80-year-old ultra marathoner Walt Stack, and also an ad with Spike Lee, who plays his character Mars Blackmon from his first film, "She's Gotta Have It." He stands on Michael Jordan's shoulders.