Impaling

Impaling damage (imp) inflicts stab wounds, like a spear or an arrow. Double penetrating damage in flesh! Impaling attacks can target the eyes and vital organs, can inflict blunt trauma, and may slip through high-tech flexible armor.

Impaling damage is subject to Overpenetration.

Against Flexible Armor: For every full 10 points of impaling damage stopped by your DR you suffer 1 HP of injury due to blunt trauma. This is actual injury, not basic damage. There is no wounding multiplier. If even one point of damage penetrates your flexible DR, however, you do not suffer blunt trauma. If you layer other DR over flexible DR, only damage that penetrates the outer layer can inflict blunt trauma.