The visuals in this Piedmont Natural Gas ad by Luquire George Andrews are confusing me. The copy reads: "When your product is invisible, the people behind it are even more important." Yet, I see the products clear as day! Cool sports coupes at the car show! Adorable dolls and teddy bears in the toy-store window! And that beef bourguignon looks succulent! Whoa, sorry. Left the stove on again and started seeing things. I'll turn that off and crack some windows. Ah, now the ad makes sense. Natural gas: the invisible killer. Thanks, Piedmont! What this commercial really needs, of course, is an invisible monkey. That guy's been hurting for work since his Dodge spot.