Answer:
I hide in a dark tunnel awaiting my time. I can only be released by pulling back. Once released I may do unstoppable damage.
I am all around, yet to me you are half blind. Sunlight makes me invisible and difficult to find. What am I?
I have a head but never weeps. I have a bed but never sleeps. I can run but never walks. I have a bank but no money. What am I?
Though not a plant I have leaves. though not a beast I have spine. Though many wouldn't need me I am more valuable than wine.
In my life I must bare, my bloodline I must share. What am I?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.