Huddled around a small monitor inside a modest hobby shop near the Santa Monica Mountains , Andrew Goodman and Brian Terwilliger each cracked small smiles.  Matthew Stafford had just improvised a line in front of cameras, and Goodman and Terwilliger, Topps executives who help oversee storytelling campaigns for the card giant, just couldn’t believe it. “He is,” Terwilliger whispered to his partner on set, “a great actor.” “He’s great,” Goodman responded. Goodman, Terwilliger and the rest of