Did Robert Downey Jr improvise I am Iron Man?

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Tags

1. #always
2. #later
3. #first
4. #improvised
5. #lines
6. #downey
7. #person
8. #stark
9. #marvel
10. #perfect
11. #universe
12. #robert
13. #minority
14. #memorable
15. #cinematic
16. #learned
17. #believed