Ladder against a tree and rope harness being set up by a camp leader in front of campers .
A camp leader is climbing a ladder .
Ladder against a tree and rope harness being set up by a camp leader in front of campers.
A camp leader is climbing a ladder.
One can not be climbing a ladder while a rope harness being set up  simultaneously.
One can not be climbing a ladder while a rope harness being set up simultaneously .