BY JOHN GUBBA

When Jenson Button overtook Sebastian Vettel on the final lap to win the 2011 Canadian Grand Prix it was a sensational finish to one of the most exciting F1 races seen for a very long time.

Britain’s former world champion – who recovered from last place at one stage despite crashes with McLaren team-mate Lewis Hamilton and Ferrari’s Fernando Alonso – described the win as the greatest of his career.

It was an epic race  that will certainly go down as one of the most amazing grand prixs in history, lasting almost four hours due to torrential rain and five safety cars.  Button pitted no fewer than six times before coming through in a dramatic final lap to claim his 10th Grand Prix victory.

CANADIAN MARSHAL’S CRAZY TUMBLE

But for many sports lovers who are not motor racing fans the defining moment of a day of pure drama was the comedy moment when a bumbling race marshal tripped as he tried to retrieve a piece of debris during a safety-car period. And in a moment of blind panic fell over again as he was faced with the oncoming F1 cars.

Luckily for him, his twin tumble came when the cars were not flat out. Even so, Sauber star Kamui Kobayashi did well to avoid him. And Renault’s Vitaly Petrov also had to hit the brakes.