Was David serious about dying himself instead of his son Absalom in 2 Samuel 18:33?

2 Samuel 18:33 The king was shaken. He went up to the room over the gateway and wept. As he went, he said: "O my son Absalom! My son, my son Absalom! If only I had died instead of you–O Absalom, my son, my son!" Clearly, David…