This communications test might seem fast at a good 650 mph, but it's nothing compared to what the Bloodhound SSC land speed record crew are testing for. Also, it makes for beautiful imagery.
This team is working for over a thousand miles an hour, so they have to fly a plane against a moving car (in this case a Jaguar F Type Coupe because if you're going to do something you might as well do it right). The trick is to up the closing speed to as high as possible.
And also make some gorgeous video in the South African desert.
The engineering involved in this LSR effort is unreal, almost as impressive as the marketing effort.