Ford star Will Davison says he has been driving for much of the V8 Supercar season with a "frightening" ailment which causes his leg to go numb.
Davison goes into this weekend's event at Sandown keen to nail down third place in the championship, with Holden duo Jamie Whincup and Craig Lowndes now the only drivers capable of winning the title with two rounds left.
Davison's effort in his first season with Ford Performance Racing is made more credible after his admission of suffering numbness in his right leg during races.
He believes a long-standing back problem combined with driving position is causing the issue which flares late in races - clearly a concern when negotiating pedals in a high-speed car.
"Pins and needles, then complete numbness. You could cut my leg off at the knee and I wouldn't feel it," Davison said.