The teens accept that it might be better for another species to take humanity's place if this is the price of its continued existence; they share a final joint as the Ancient Ones finally stir, destroying the Facility.
It might be better for another species. This was to take humanity's place. This is the price of its continued existence. The teens accept this. Ones finally stir. This is as the Ancient. This is what they share a final joint. They is destroying the Facility.