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He made his career playing cretins and imbeciles, yet, dammit, WOODY HARRELSON is a marketing genius. Realizing that Los Angeles is exactly the sort of place where people will pay top dollar for something free and plentiful, he opened O2, an oxygen bar, which offers patrons a mouthful of oxygen-enriched air for $13 a hit (laced with lemon or lime, it costs an extra $2). Brilliant as it is, it's not as good an idea as the SunSpot, a round towel on which beach goers could rotate themselves to remain in the sun's direct light throughout the course of the day. Sadly, the towels never caught on, nor did the all-hemp suit Harrelson had designer Giorgio Armani create for the 1997 Oscars. Undeterred, Harrelson unveiled the Headwaters Hiker earlier this year, the first in a line of environment-friendly footwear made entirely from hemp. Wearers should note that "mistakenly" smoking your shoe is illegal in all 50 states.