activities aims ascend ascending belayer belaying chalk chalk bag climb climber climbing climbing harness climbing rock climbing rope climbing technique climbing wall competition danger descend descending equipment give outdoor sport risk rock rock climbing shoes safety safety harness shaped climbing holds sport structure surface take TARGETS Tension woman work-life-balance boy self-confidence trust achievement blue hand holds orange persistence rock wall rope shoes silhouette sky struggle wall wood extreme hard mountain scale scout scouting scouts baboon baboons child herd monkeys mother play rocks