Some memories are written deep into the unconscious, unspoken but known nonetheless. Some wounds cut deep enough that the legend of the scars never entirely faces. Some sights - a flash of silver, a glint of steel - stir up those dark, forgotten corners of the mind and say "here, here is the fang that bites, here is that which would cut the heart from you; here is your doom".
lizard brain memory maybe, idk XD