A pilot test.
In rallying they say: the brain sits on the right. That means it's the co-driver who calls the shots and the driver must follow these instructions. Unquestioningly and without opposition.
But what happens if the co-pilot has absolutely no idea what he should be saying to his pilot and to cap it all the latter is a racing driver of international renown who in actual fact does not need to be told what to do by anyone when she's doing her laps on the race track?