Is it polite to wear a big backpack on your back when the train is crowded?, If you are listening to music, should you play it loudly from your phone's speaker?, If you have a seat, is it okay to put your bag on the empty seat next to you?, The train has seats marked for elderly people, pregnant women, or people with disabilities. If you are sitting in a regular seat and one of these people is standing, what should you do?, Is it okay to lean on the metal pole with your whole body?, On the stairs, should you stand in the middle, or on one side?, Should you always try to make eye contact and talk to people on a crowded subway?, Should you take your garbage, like a newspaper or water bottle, with you when you leave the train?, When the train doors open, should you step inside right away?, If you are standing on the platform, where should you wait for the train—right in front of the doors or to the sides of the doors?, If you are standing near the train doors and your stop is coming up, when should you start moving toward the door?.

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