In Korean tradition, dreaming of an accident is read as inauspicious. It is most often tied to 건강, 전반.
An accident warns of sudden misfortune, yet walking away unharmed was sometimes read as misfortune already spent. Watching another's accident, look to those around you.
Tradition reads the symbol as an omen; psychology reads the same dream as a mirror of your present state. Describe your dream and both readings appear together. Interpret your dream