"Talk and die syndrome is a fairly uncommon syndrome occurring after a head injury. Directly after the injury, and possibly for several hours thereafter, a person appears fine. They may not show signs of concussion or cranial bleeding, and they may be talking and have no difficulty walking or have other symptoms of neural damage. However, as the condition progresses, the person gets suddenly much worse, and damage at this point may be too significant to cure. In these cases, people go from talking and seeming fine, to comas or unconsciousness, from which they may not recover. Total brain death can occur, as happened in the tragic death of actress Natasha Richardson in 2009, after what appeared to be a minor injury to the head while Richardson was skiing."