seems like my fork has something rattling around inside of it. I searched the forums extensively and it seems like someone else had this problem-- they said it was a piece of glue that broke off inside the fork and runs around.

When i shake the fork, or invert it, you can hear a light "particles" falling and bumping around inside the hollow fork. Real strange.

Is it possible that its just a piece of glue or something? I didn't know carbon forks legs were hollow? I thought they were just a single piece of carbon? What can explain this "rattling?" Is it dangerous?!?!?!? omg... (its a carbon fork with aluminum steerer if it matters any)

All forks, except those on 1960s era Schwinn Varsity and their ilk, are hollow. Do a careful visual inspection, looking for any signs of cracks or loose fork tips. If no visual problems, then it's just a piece of loose "stuff" in there, and it will not be an issue.