The first thing that comes to mind, whenever you see a monster truck is the destruction that this monster can cause. We all know that it is capable of such in the wrong hands. That is why, only a few individuals used it on the road in the first place.
However, in this game, you won't care about the destruction that it can cause since that is your objective. You need to crush as many cars possible before you reach the finish line. That will determine your score and you will advance to the next level.