London, Nov 1 Ace Formula One driver Jenson Button, who clinched the championship with a stunning drive in Brazil, has revealed the nightmare that lay behind his world title.

Button (29) admits he blew his top after a disastrous qualifying session at the Singapore Grand Prix.

Button qualified a lowly 14th in Brazil but his storming fifth-place finish in the race clinched the title.

Button won six of the season's first seven races. But as a 26-point lead was eaten away by his teammate Rubens Barrichello and the Red Bulls drivers Sebastian Vettel and Mark Webber, he tried to hide the tension.

"You don't want to show that you're stressed. It's a weakness and you bottle it up inside you. The championship is over almost 10 months and that's a long time to be on the edge of your seat. You go to sleep thinking about it, you wake up thinking about it," News of the World quoted Button, as saying.

"You sleep less and when you are going out for qualifying so much runs through your mind. When you start worrying about things, that's when you want people around you who understand who you are," he added.

Button battled with his mental stress and confided in Brawn, the man behind Michael Schumacher's seven world crowns.

"I spent a lot of time with Ross. We'd discuss Michael's years of fighting for the championship. It was good to hear Ross's view. He knows it's never easy in F1 even if you have a superior car. You can be a very positive person but you still have doubts and weaknesses," said Button.

Button's tension reached peak during September's Singapore Grand Prix when he qualified only 11th and then furiously let rip to Brawn over the team radio: "This is how to lose a championship!" (ANI)