Answer:
When you take away the whole from me, there is always some left. What am I?
With three eyes and as black as night I frequently knock down ten men with a single strike!
I can fall off a building and live but in water I will die.
I climb higher as I get hotter. I can never escape from my crystal cage.
Never resting, never still. Moving silently from hill to hill. It does not walk, run or trot. All is cool where it is not. What is it?
When is it bad luck to see a black cat?