That'll do it.

LITTLETON, Colo., Jan. 16 (AP) - A dentist found the source of the toothache Patrick Lawler was complaining about on the roof of his mouth: a four-inch nail he had unknowingly embedded in his skull six days earlier...Mr. Lawler had what he thought was a minor toothache and blurry vision.

He was probably right about the blurry vision part, anyway.

Clik above or copy an' paste: http://www.nytimes.com/2005/01/17/national/17nail.html