Answer:
What should you do when you see a green man?
It comes only before, it comes only after. Rises only in darkness, but rises only in light. It is always the same, but is yet always different.
What has ten letters and starts with gas?
What is always coming but never arrives?
What goes trough your head but you forget it like 3 days after?
This food is a tortilla filled with cheese and sometimes chicken before being heated or cooked.