Now a certain man of the servants of Saul was there that day, detained before Yahweh; and his name was Doeg the Edomite, the best of the herdsmen who belonged to Saul.
Now it does definitely declare that David was afraid of Achish. The fear of man can oftentimes cause a person to act like a fool. It brings a snare. So my brave David, he's not afraid of the giant, he's afraid of the king. So acting like a madman, he's reduced to a man with spit running down his beard and scrabbling on the doors and gates, but he did escape out of the hand of Achish. "