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 go through a door but never go in and never come out.
I am as hard as metal, yet as flimsy as glass. I shine like a star, yet I am only a rock. What am I?
I am the place to turn to when nature calls. What am I?
What's full of holes but still holds water?
I flow from the Homerβs mouth when he sees doughnuts.