FALLING ROCK—Alberta, Lake Louise. Stephen Pope was hiking in the Beehive area behind Lake Louise on July 31 and sat to eat lunch below a rock face. A large boulder fell and crushed his femur. (Source: Banff Crag and Canyon, early August, 1977.)

Analysis: People often sit under rock faces in the mountains; but rocks often fall, and, therefore, one should avoid being in their path if possible. (Source: E. Whalley.)