Although it's difficult for a casual observer to distinguish the difference, one is induced by inhaling the aromatic smoke that arises from burning the various parts of Cannibis sativa or indica; the other makes its onset rudely felt as an unwelcome stupor after too many hours in the punishing sun. Either way, the reputation of certain Tucsonans for such torpid incomprehension actually serves us all-those Not From Here tend to underestimate us. They'll summon up a reaction that's similar to a Bostonian's impatience with a Piggly-Wiggly checkout line. Use this to your advantage, Tucson. Make 'em regret letting their guard down around such deceptively sharp tacks!