I mean that literally. X-Ray photo at link, for which thanks to Gerard Saylor.
Troops unite to save soldier knifed in head - Army News, opinions, editorials, news from Iraq, photos, reports - Army Times: "It felt like a nasty sucker punch. Yet when he strained his eyes to the hard right, there was something that didn’t belong: the pewter-colored contour of a knife handle jutting from his skull.
Sgt. Dan Powers, stabbed in the head by an insurgent on the streets of East Baghdad, triggered a modern miracle of military medicine, logistics, technology and air power."