Who said "I built this in a cave, with a box of scraps!"?

This quote is attributed to Iron Man.

I built this in a cave, with a box of scraps! - Iron Man

"I built this in a cave, with a box of scraps!"

Iron Man Creativity

"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."

"When life gives you lemons, make something beautiful."

"Creativity knows no bounds."

"Creativity is the expression of the soul."

"I'm making this up as I go."