Who said "The whole thing is insane! There's no way it should work!"?

This quote is attributed to Doc Brown.

The whole thing is insane! There's no way it should work! - Doc Brown

"The whole thing is insane! There's no way it should work!"

Doc Brown Imagination

"This is heavy."

"There's that word again, 'heavy.' Is there something wrong with the Earth's gravitational pull in the future?"

"Great Scott!"

"If my calculations are correct, when this baby hits eighty-eight miles per hour, you're gonna see some serious shit."

"Imagination is more powerful than knowledge."

"The world is full of wonders if you know where to look."

"You have the imagination of a child, Lucy"

"The world is full of mysteries waiting to be solved."