Who said "I'm making this up as I go."?

This quote is attributed to Indy.

I'm making this up as I go. - Indy

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

Indy Adventure

"It's not the years, honey, it's the mileage."

"Fortune and glory, kid."

"Snakes. Why'd it have to be snakes?"

"That's how we archaeologists tell time."

"The greatest adventure is life itself."

"The adventure of life begins with a single step."

"Adventure finds you when you stop running."

"Fortune and glory, kid."