Frentzen describes 'biggest impact' of his life

The German went into the barriers three laps from finishing second and was helicoptered to hospital where he had three brain scans.

He was given the all clear but banned from driving a racing car for a week and forced to miss pre-French Grand Prix testing, but still leapt back into the car at Magny Cours on Thursday and ran sixth fastest.

'I have some bruises and you notice them on the first lap but then you are focused after that and you forget you have pain,' he said.

'It was one of the biggest impacts I had in my life. The headrest broke and I felt a little bit dizzy.

'There is a very short run off area where I lost my brakes and I went from 130 to zero and I only had half a metre to do it.'

'The engineers said I had seven 'G' lateral impact in the accident but I think it was a lot more than that. We have seven 'G' when we brake for a corner."

Team boss Eddie Jordan has admitted he was worried his prize driving asset would be affected by the accident.

'You see drivers take a bash and they are not the same for a few races. But Heinz-Harald was incredible.

'He wasn't allowed to do the test by the doctors but he leapt back in the car today and was right back on it.'

Frentzen, like Jordan, fears the loss of the six points could cost them dearly as they battle to finish in their highest constructors finish ever - third.

'I think we may miss those six at the end of the year when we are looking for third in the constructors championship. They could be very important then.'