In many video games there is physics systems and rules and boundaries created. In the popular Grand Theft Auto V, there is a physics system in place that is made to resemble and imitate the same physics rules that w know in reality and on planet earth however there are many short comings in this game that are very apparent. First off, there are certain objects that have literally infinite inertia. For example tree cannot be moved in any direction to the slightest degree. You could run the largest commercial plane into the smallest tree in the game and the tree still would not move. Also it is possible, somehow, to drive a car off of the tallest building in the game (316 meters) and land without any damage to the car. Overall games will attempt to push themselves toward reality while never being exactly that.