Answer:
I am a protector. I sit on a bridge. One person can see right through me, while others wonder what I hide. What am I?
I am the kind of food monkey likes and people slip on me and fall in cartoons.
I have two bodies joined together as one. When standing still I run and run.
I go inside boots and outside shoes. What am I?
Glittering points that downward thrust. Sparkling spears that never rust.
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.