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 stand in one place yet I fill a whole room. I can be filled with molten rock and come in every hue.
Born of sorrow, grow with age, you need a lot of me to be a sage. What am I?
The most famous dinner
The more you take the more you leave behind. What am I?
When is it bad luck to see a black cat?