Flying by the seat of his pants
Juan Pablo Montoya's hopes of ending his Williams career on a high evaporated with the team's poor form.
First GP: Australia 2001
2004 position: 5th
Previous teams: N/A
That left the inspirational Colombian struggling to make an impact in 2004.
There were still the occasional moments of improvisational brilliance, but there were also days when he was so ordinary as to seem absent.
Montoya's forthcoming battle at McLaren with Kimi Raikkonen - the only other man to worry Michael Schumacher - will be watched with fascination.
Montoya has the speed, aggression and - most obviously - the improvisational skill to beat Schumacher in a straight fight.
He is the most exciting driver in Formula One, a man who pulls off passing moves that seem invisible to other drivers. He is one of the best overtakers in the history of F1.
He also has a rare gift for improvisation, and a hard-nosed approach to racing.
But insiders at Williams say he has yet to get the most out of his precocious talent, that he needs to work harder to exploit his full potential.
In particular, Williams say Montoya still does not know how to get the best out of his car, and they are also less than convinced about his commitment.
They believe he is not fit enough, and that he does not work hard enough at his job.
Frank Williams has told Montoya that he should model himself on Michael Schumacher, the man he is trying to beat.
It is not yet clear whether Montoya has taken the message on board.
If he does, he will be hard to beat. If he does not, he may well find the same of Raikkonen.