What does an upside down flag represent?

Related questions

1. Can the British flag be upside down?
2. What is the official English flag?
3. Is flying a foreign flag legal?
4. Can you legally burn the flag?
5. Why is UK called Great Britain?
6. Is it illegal to burn a flag UK?
7. What does the flag look like in England?
8. Why is UK and England flag different?
9. Can you hang a flag vertically?
10. What does it mean when the American flag is flown upside down?

Tags

1. #extreme
2. #union
3. #symbol
4. #instances
5. #should
6. #except
7. #property
8. #pondered
9. #meaning
10. #danger
11. #according
12. #displayed
13. #american
14. #distress
15. #states
16. #signal
17. #upside
18. #never
19. #others
20. #united