"Jacob set off briskly, and headed toward the land of the people of the East."
Literally, “Jacob took up his feet” - with his actions, Jacob was setting the events in the relatively near future, and the distant one, at the end of days. His fast departure was creating for later an equally fast departure from Egypt. His going to the east later led to going to receive the Torah.
The meaning of the well in the field and the large stone on top of it can be explained as follows. The stone represents all the hard questions and the possible answers that one finds on his way to truth. Since there are so many questions and so many possible answers, everybody seems right, but the truth remains unattainable. With his single-handed rolling of the stone, Jacob represented later great thinkers who could illuminate the minds, making things crystal clear, and water the flocks. That was only true in their generation however, since repeated arguments and repeated answers again obscured the truth and again made it unattainable.
In the future Jacob will be reincarnated and this time he will break the stone as a hammer that splits the rocks. He will then roll off the stone from the mouth of the well, this time without any questions or hard-to-understand concepts, and all his explanations will be true.
This is also hinting to the phrase “I am God your Lord.” The four letters of God's name “Havaya” (יהוה), are hinted to by two stone tablets and the ten commandments on them. Each tablet thus contained five commandments. The size of each tablet was six by six hand-breadths, altogether third-six, and the two tablets measured 72 (עב). That is the secret of the phrase “God said to Moses, 'I will come to you in a thick (עב) cloud, so that all the people will hear when I speak to you. They will then believe in you forever.'”
Art: Feodor Alexandrovich Vasilyev - Storm Clouds