There are many limits in a normal car as it can be driven backwards with ease. You might be able to drive it backwards if you are that good of a driver, but it can't be driven the way you want it to be. Even if you practice a lot, there would be some limitations in it.
In this game, that limitation is lifted as you can drive the car backwards with ease. Aside from driving your car backwards, it can tumble down like no other car can. For sure, that would impress even the best racers in the world since tumbling down seems like a common thing in the racing world.