There are throngs of people milling around, she keeps thinking that she sees her friend, but every time she's about to catch up, she loses him. This goes on for a long while, she finally finds him again when he is in reach. His back is turned, so she taps him on the shoulder. Since she's a bit exasperated by this point, the tap is not gentle.
James Garner (icily): "Can I help you?"
Aunt Mimi (embarrassed): "Oh! You're not Jim!"
James Garner: "The hell I'm not!"