Supermodel Christina Estrada was really in her element being chauffeured around London in a convertible Lincoln while chatting to her friends on her mobile. In order to capture this informality, Bob had to set up the car with flash guns attached to the windscreen and with his assistant lying on the floor of the car at Christina’s feet - Bob had to stand on the front seat of the car facing backwards leaning against the windscreen. After an hour of this in the heat of the summer and with wallowing American suspension they were all feeling totally unglamorous and very carsick.