From Wayne Grudem's Systematic Theology:
Some people deny that they have an inner sense of God (see Romans 1:18-32 - mv). But their awareness of God will often make itself evident in a time of personal crisis, when deep-seated convictions of the heart show themselves in outward words and deeds. Several years ago I was a passenger in a car with several friends, including a young woman who in conversation was firmly denying that she had any inner awareness of God's existence. Shortly thereafter the car hit a patch of ice and spun around in a complete circle at high speed. Before the car came to rest in a large snow bank (with no serious damage) this same woman could be heard distinctly calling out, "Lord Jesus, please help us!"
Wayne Grudem, Systematic Theology, 141-142