His head caught hold of the oak. — Absalom in his flight found himself among his enemies, and sought to escape into the denser parts of the forest. As he did so his head caught between the branches of a tree, his mule went from under him, and he hung there helpless. There is nothing said to support the common idea (which seems to have originated with Josephus), that he hung by his long hair, though this may doubtless have helped to entangle his head.
Related Commentaries of 2 Samuel 18:9
2 Samuel 18:9
9 And Absalom met the servants of David. And Absalom rode upon a mule, and the mule went under the thick boughs of a great oak, and his head caught hold of the oak, and he was taken up between the heaven and the earth; and the mule that was under him went away.