Answer:
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?
When I point up, it's bright. When I point down, it's dark. What am I?
I am always coming but I never arrive. What am I?
Always in you, sometimes on you. If I surround you, I can kill you. What am I?
Without me everyone would lose their head.
What do you called a sad coffee?