Who said "We've got to think bigger. Much bigger."?

This quote is attributed to Dr. Emmett Brown.

We've got to think bigger. Much bigger. - Dr. Emmett Brown

"We've got to think bigger. Much bigger."

Dr. Emmett Brown

"Great Scott!"

"This is heavy."

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

"If my calculations are correct, when this baby hits 88 miles per hour, you're gonna see some serious shit."