What allows Nancy to run without watching her feet and jump out of her truck without thinking about it?

proprioception

Explanation:

Proprioception also known as kinesthesia or described as the "sixth sense" explains one's natural ability to perceive his body's position and movement such as kicking a ball without looking at it. In the example Nancy is able to run without watching her feet because of this instinctive ability. Proprioceptors and mechanosensory neurons are located in muscles, joints and tendons and mediate this process