Answer:
I run smoother than any rhyme, I love to fall but cannot climb. What am I?
I am a protector. I sit on a bridge. One person can see right through me while others wonder what I hide.
I always follow you around, everywhere you go at night. I look very bright to people, but I can make the sun dark. What am I?
I am brown and sticky
I may seem real but it always turns out I was never there in the first place... you only see me during a certain resting stage.
The more of me you take, the more I appear behind you. What am I?