BOSTON—Noting his short outbursts of laughter as he charged across the house, sources confirmed Saturday that pajama-clad 5-year-old Lucas Mason made a turbulent rampage through a dinner party hosted by his parents. Mason, who reportedly hopped around the living room growling and stomping like a dinosaur in front of eight of his parents’ friends and coworkers, is said to have quickly circled around the coffee table several times before grabbing a handful of tortilla chips. Reports indicate that the preschooler then slipped between several of the guests, interrupting their conversation to regale them with a ranking of his favorite Transformers. Sources confirmed that the 5-year-old, who had removed his astronaut pajama top during his escapade, briefly disappeared from the social gathering, but soon returned dragging a bin full of plastic trucks, which he dumped on the floor in front of the makeshift cocktail bar and snack selection that had been set up on a buffet table. At press time, Mason had reportedly made eye contact with his parents and immediately gone into hiding under a chair in the kitchen.