(Oregon City, OR)  --  A Canby man is dead after being hit in the head by a falling rock while rock climbing.  Clackamas County authorities say the man's friend called 9-1-1 after finding his body hanging from a rope along the face of a 60-foot cliff at the edge of Waterboard Park in Oregon City.  Authorities say the man was climbing by himself when he was killed, and it's unclear whether he was going up or down at the time of the incident.