Answer:
A move made popular by the King of Pop.
I widen my jaws when you poke two fingers in me. I especially like to devour papers
If a man carries my burden they will get crushed to death. Though not rich I leave silver in my track.
I have two bodies joined together as one. When standing still I run and run.
What has a head and a tail but no body?
What language does a billboard speak?