So, interestingly enough, if you have two cars on the same track, the car in second goes faster, presumably because the voltage drop after the initial vehicle causes the vehicle in front to have less speed.
Which means if somebody is winning and you had a custom blue shell that you placed on the track behind them, they would slow down and get hit by the blue shell. Possibly knocking them off the track due to the speed difference, especially around the tight turns.
