Death is cold!

Being on stage and not  knowig the script means that you are unprepared for an exam, and is quite ordinary.   remembering lines could indicate inaequacys & incompatence in some area of life.   Dreaming you are on stage may also represent the roles in life you play.  Also how the world sees you.   If lines are forgotten you might be uncomfortable with some level with a false hood you are putting on for others