You spin round and run in the direction you came from, the bat still attacking you. If only you had your matches! But your pack is gone - you might fight without it.
You reach the door and push, but it seems to be stuck fast!
The bat claws again at you, and you feel warm liquid trickling down your arm. You need to get out - fast!
You give an almighty push, and the door springs open, throwing you out through it. You loose your footing and crash down the stairs you entered by, the bat streaking after you.
Your head hits stone again and again and again. Your skull cracks, and the bat swarms up your body.
You have failed to retrieve the diamond. Your journey ends here.