Answer:
Without this, eating food and Steven Spielberg's career would be very different.
What hangs others yet can unintentionally hang itself?
This thing runs but cannot walk, sometimes sings but never talks. Lacks arms, has hands; lacks a head but has a face.
A dragon's tooth in a mortal's hand, I kill, I maim, I divide the land.
Only two backbones and thousands of ribs.
What covers its face with its hands, speaks no language, yet most known what it's saying?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?