April 3, 1 Samuel 21:10-15
Why David would go tot he very city of the man whose head he cut off, and while carrying his sword is beyond me. The people recognized who this was, perhaps they recognized the sword. Maybe there was an element of fear on the people at first. And then David's behavior afterwards, he could have realized his mistake in going there and in a state of panic or terror acted strangely. Some commentaries say he appeared to have an epileptic fit. We do know that in extreme situations people will behave in strange manners, in this case the behavior saved David's life.