The former prisoners run from the mineshaft as the tremors increase in frequency and intensity. They run until their legs and their lungs burn and then they run some more. The ground shaking becomes a constant thing and footing is difficult to maintain as you dodge falling rocks and weave around debris.
After nearly an hour of running through the moonlit night, coming down somewhat in elevation, you reach a saddle on the mountain where there is a clearing with an ancient stone temple in it. Heavy stone doors bar the way in, though the constant tremors seem to have jarred on door loose from the frame and it looks as though it might be able to open.
In the distance, from the direction of the mine, a large explosion is heard...