This is an important theme in the psychology of danger. It is found in popular culture and nightmares. It relates to the appreciation of danger and the psychology of escape. It is important in man and animals for survival. There are cognitive elements because a judgment of being in danger from a predator or enemy is needed to trigger escape behaviour. The neurobiology has been studied notably by Mobbs et al. (See: When Fear Is Near Threat Imminence Elicits Prefrontal-Periaqueductal Gray Shifts in Humans Dean Mobbs,* Predrag Petrovic, Jennifer L. Marchant, Demis Hassabis, Nikolaus Weiskopf, Ben Seymour, Raymond J. Dolan, and Christopher D. Frith, available in full online at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2648508/.)
The chasing theme sometimes occurs in fibromyalgia patients in their nightmares. There is some chance that this theme is more prominent if fibromyalgia patients than in the general population. More study is needed. There is an association between fibromyalgia and PTSD, and an association between PTSD and nightmares.