California, Yosemite National Park, Arrowhead Spire. On 12 November, David A. Brewer (20) and Pat Noonan (19) signed out at Park Headquarters at 8:30 a.m. to climb Arrowhead Spire. Ascending the approach route to the base of the spire they got slightly off route. In a steep scree shoot at the base of the spire Noonan dislodged a rock about seven inches in diameter which struck Brewer on the back of the head. Brewer blacked out momentarily, but did not lose consciousness. Fortunately, Brewer was just a few feet below Noonan and the rock had not enough distance to get momentum. Brewer was able to descend the second and third class route with a belay from Noonan and went to the hospital. Brewer suffered a slight laceration and concussion.

Source: Rick T. Anderson, Park Ranger, Yosemite National Park.

Analysis: This accident could have been prevented had the boys used proper techniques in ascending the scree slope, and a hard hat would have prevented any injury.