While listening to his passenger's nervous laughter.
There aren't a lot of Formula 1 teams owned by supercar manufacturers, but thankfully the few that do exist know that it means more as a marketing tool than just having logos on the cars. So McLaren put one of their F1 drivers, Kevin Magnussen, behind the wheel of a 650S at Racing Festival 2014 in Denmark. In Magnussen's hands, it becomes apparent what kind of really insane speeds the car is capable of.
All through the video, we can hear what sounds like the cameraman nervously laughing, a reaction to the totally fearless driving style being demonstrated.