Questions surrounding a jacket with a large American flag on the back

• Is the jacket allowed to touch the ground?
• When the jacket becomes tattered or otherwise damaged, must it be disposed of by burning?
• Due to its material, what if the jacket didn't burn? What are the restrictions regarding melting jackets flags?
• On a day of mourning, should the jacket be tied around the waist, as to fly the flag at half mast?
• If a person is wearing a jacket with a state flag or the flag of a foreign country on it, and the individual wearing the American flag jacket is shorter than the other person, must they switch jackets?
• When in danger, ought one to put the the jacket on upside-down?
• Should the jacket be illuminated if worn at night?
• If the national anthem starts playing, and no other flag is visible, should the wearer try to face the back of their jacket?