Who said "I didn't stutter."?

This quote is attributed to Tony Stark.

I didn't stutter. - Tony Stark

"I didn't stutter."

Tony Stark

"I am Iron Man."

"Genius, billionaire, playboy, philanthropist."

"Sometimes you gotta run before you can walk."

"I'm not saying I'm Batman. I'm just saying nobody's ever seen me and Batman in the same room."