Answer:
What loses its head in the morning but gets it back at night?
Taken from a mine and then locked up in a wooden case. I am used by students everyday.
Angels and pilots work with me.
I love to twist and dance. Though wingless, I fly high up into the sky. What am I?
I have two bodies joined together as one. When standing still I run and run.
The answer I give is yes, but what I mean is no. What was the question?