Utah man pulls gun on fellow motorists acting out mustard ad
                                
                                
                                    (Newser) -
                                    A Utah man got a little testy when passengers in a neighboring car, re-enacting a famous TV spot, gestured for him to roll down his window and asked if he had any Grey Poupon mustard. "Here's your Grey Poupon, roll your [expletive] windows up," said the 22-year-old, who...