Understanding gravity was much simpler for Max once he broke his preconceived notion about gravity that it was an attractive force.
Max had believed that gravity was a force inherent to any object having mass and that it was always attractive in nature.
A small ball looking object could have the same gravitational force like that of a planet if it had enough mass inside of it, however, while these laws held true in the rest of the universe, they did not hold true for the chaos realm.
Here gravity was not only an attractive force, but rather could attract, repel and have no interaction with matter at all.
The trajectory of the stone that Max threw was dependent on how the gravity acted on that stone at that particular instance, yet in this plane gravity was shifting constantly, but his visible surroundings were not.
