Why did Hulk leave the Avengers in Age of Ultron?

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Tags

1. #previously
2. #think
3. #hawkeye
4. #stealth
5. #banner
6. #never
7. #inability
8. #endangers
9. #leaves
10. #lives
11. #quinjet
12. #people
13. #discussed
14. #bruce
15. #avengers
16. #while
17. #leave
18. #becoming
19. #doing
20. #remain
21. #natasha
22. #again