According to the Bible (2 Samuel 18:9), Absalom's long hair got caught in the branches of a large oak tree as he was riding his mule. This happened during a battle with his father, King David, and left him vulnerable to Joab, a general in David's army, who ended up killing him.
It's a tragic tale, highlighting the dangers of pride and rebellion, and it's a story that has been retold and reinterpreted many times throughout history.