Every time I hear of any brain injury, fatal or not, I am saddened by it. Too much experience for me. This type of accident is all too common, and people need to realize that anytime they hit their head hard, they should seek medical attention, even if they "feel fine" right afterward.
The brain has no nerve endings, and an injury to the brain will not cause immediate pain. Pain only begins when the pressure is so great that it causes the skull to receive pain signals, creating a headache.
With every brain injury, immediate care is of vital importance to increase the chance of survival.