Famous for, among other things, telling everybody to "Just do it." Unfortunately, Nike has never bothered to clarify what "it" is, likely leading to any number of easily influenced customers doing incredibly stupid things. Possibly very funny things (drinking the expired milk in the fridge) or horrible, dark things (that the voices in their heads had been telling them do for weeks before, and all they needed was that little push...). For my money? I think "it" is "buy shoes and sunglasses."
Nike official site