Answer:
I can fly but I have no wings. I can cry but I have no eyes. Wherever I go darkness follows me.
I widen my jaws when you poke two fingers in me. I especially like to devour papers
When I point up, it's bright. When I point down, it's dark. What am I?
What is black when you buy it, red when you use it, and gray when you throw it away?
I break down buildings, I crumble mountains but you can't see me. What am I?
I flow from the Homerβs mouth when he sees doughnuts.