Asian Whiplash is a self-inflicted injury that usually affects those with yellow fever. When the affected individual sees someone of Asian decent, they quickly turn their, or turn their head to far in one direction, to look at the person, causing an unpleasant pain in the neck. The pain in the neck is usually cancelled out by the pleasure on the eyes at the sight of an Asian, however, so they never learn and the injury rarely gets a chance to heal.
Person A (Plagued by Yellow Fever) is walking down the street and they see an Asian. Not wanting to be TOO obvious and stop walking, they turn their head as they continue on, causing Asian Whiplash. Persons accompanying Person A are likely heard to say "Don't break your neck!"