Australia’s fastest grandma, Barbara Colllier, age 70, co-pilots a Datsun Bluebird with her grandson John, age 14. He needed a certified passenger to compete at Toowoomba’s Charlton Speedway but his grandfather Jack failed a mandatory medical exam. That’s when Barbara donned a full race suit and helmet to step in. Now she hits the track for four races at every meet. Good on ya, granny!