Who said "I've got one shot at this."?

This quote is attributed to Iron Man.

I've got one shot at this. - Iron Man

"I've got one shot at this."

Iron Man Courage

"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 let fear stop you from chasing your dreams."

"Courage is being afraid but doing it anyway."

"Sometimes you gotta do what you gotta do."

"Sometimes you have to be the monster to stop the monsters."