Damn, Chippie beat me to the Le Mans idea! So here are some alternatives:
-Put all of the cars in a giant lottery machine and let each one fall out onto the track at random every few seconds.
-A game of mass charades. Bernie Ecclestone does the actions, and whenever a driver gets one right he’s allowed to start
-Let drivers choose their own grid position, on condition that things are evened up in other ways. For example, the pole sitter is only allowed 3 wheels, while the cars starting from the back are equipped with flamethrowers
- Do away with grid markings and simply squeeze all 24 cars side by side onto the start line together, like runners in a 1500m race.