17) Iron Man (2008)

The iconic "I am Iron Man" line, said by Robert Downey Jr., was actually an inspired addition to the script during filming. Downey believed that Tony Stark would have been more cocky if he had been able to reveal his superhero identity so confidently. Favreau agreed with him, and that one spontaneous line ended the film on a high note but set the tone for the entire Marvel Cinematic Universe. It has now been labeled as one of the greatest scenes in superhero movie history.
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Edited by Abhimanyu Sharma