Answer:
I am round as an apple, deep as a cup. All the King's horses can't pull me up. What am I?
I shift around though always slowly. I never move more than a few inches at a time. A large movement by me can kill many people. I am huge yet unseen by humans.
I let water fall on you while everyone else stays dry. What am I?
What gets sharper the more you use it?
I hide in a dark tunnel awaiting my time. I can only be released by pulling back. Once released I may do unstoppable damage.
Why was the cook arrested?