Who said "The consequences of this event could be disastrous."?

This quote is attributed to Doc Brown.

The consequences of this event could be disastrous. - Doc Brown

"The consequences of this event could be disastrous."

Doc Brown

"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."