Who said "What did I do? I did nothing."?

This quote is attributed to Iron Man.

What did I do? I did nothing. - Iron Man

"What did I do? I did nothing."

Iron Man Humor

"I am Iron Man."

"Genius, billionaire, playboy, philanthropist."

"I'm not the one who should be worried."

"This is the most important thing I've ever done."

"Never underestimate the power of a good laugh."

"Laughter is the best medicine."

"A good laugh is the best medicine."

"Laughter is contagious and wonderful."