pile 2.
a man in stranded on an island covered in forest. wind is blowing from the west. lightning strikes to the west side of the forest and starts spreading with the wind. the fire will burn the whole forest killing the man in the process. there are cliffs around the island so that man cannot escape. how can man survive the fire?
man picks up a logs , lights it up with the fire from the west end. then he runs towards the east and lights that part of the forest. this will burn up the eastern end of the forest and then man can take shelter in that burnt area 