5 minutes=5 min or 5 mins I want to briefly depict 5 minutes. Which one is right, 5 min or 5 mins?

From a movie called a walk to remember Citizen high to citizen low.

what is this meaning: at the curtain's call I am not sure the meaning of these: first, at the curtain's call second, that's your callCitizen high to citizen low. This is a sentence from a movie called A walk to remember. But I don't know its meaning.

Whether it is good to think throughly before making the final decision. I definitely hold the opinion that we should think throughly before we make the final decision. First, when faced with a decision, it's best to take sometime --relax and cool off--so logical thinking can guide us to the best choice. Second, through thinking comprehensively, we can set up a concrete plan. With the guidance of the schedule, we can have a high efficiency when we carry out the plan. Therefore, that's the reason why I prefer to think twice before making decision.