Then came David to Nob to Ahimelech the priest: and Ahimelech came to meet David trembling, and said to him, Why are you alone, and no man with you?
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. "